“Similar To” or “Similarly To”: Which One Is Correct? (Meaning & Examples)

You’ve typed a sentence, paused, and stared at it. Is it “similar to” or “similarly to”? You’re not alone. This is one of those small grammar snags that trips up native speakers just as often as learners, and honestly, that’s a little comforting.

Here’s the good news: the answer isn’t complicated once you see the pattern behind it. Let’s clear it up for good.

Quick Answer

“Similar to” is correct almost every time you’re comparing two things. It’s an adjective phrase, and it pairs with nouns: This phone is similar to that one.

“Similarly to” is grammatically shaky and rarely necessary. “Similarly” is an adverb, and adverbs describe actions, not things. So ” only works in narrow cases where you’re comparing how something happens, not what it is.

If you remember nothing else from this article, remember this: when comparing nouns, use .” When describing the manner of an action, you probably want “in a similar way to” or “just like” instead of forcing “similarly to” into the sentence.

Now let’s dig into why.

The Core Grammar Rule (Why This Confuses People)

English loves to sneak exceptions into patterns that otherwise feel predictable, and this is one of them.

“Similar” is an adjective. Adjectives describe nouns. So “similar” naturally attaches to a noun, and it needs a preposition to link the comparison — that preposition is “to.” A tiger is similar to a lion. Simple, clean, correct.

“Similarly” is an adverb. Adverbs describe verbs, other adjectives, or entire clauses. They tell you how something happens. So when you say “similarly,” you’re usually modifying an action: She sang similarly to how her mother did.

Here’s where it gets messy. A lot of people treat “similarly” as if it can swap in for “similar” whenever a sentence “sounds fancier.” It can’t. Slapping an -ly on a word doesn’t make it more formal or more correct — it changes its grammar role entirely, and that’s the root of nearly every mistake on this topic.

Think of it like this: “quick” and “quickly” aren’t interchangeable either. You wouldn’t say “she is quickly,” because “quickly” needs a verb to attach to. The same logic governs “similar” and “similarly.”

What Does “Similar To” Mean?

“Similar to” means two things share common qualities or shared characteristics without being identical. It’s a comparison phrase used to point out that two nouns resemble each other in some meaningful way, even though they’re not the same thing.

The similar to definition, in plain terms: alike in nature, appearance, or quality, but not exact matches.

Sentence pattern:

[Noun] + is/are similar to + [Noun]

Examples:

• Dolphins are similar to whales in body shape.
• Her writing style is similar to Hemingway’s.
• This job is similar to my last one, but the hours are better.

Notice that in every case, “similar to” links two nouns or noun phrases. That’s the giveaway. If you can point to two “things” being compared — objects, people, ideas, situations — “similar to” is your phrase.

How to Use “Similar To” Correctly

Getting the similar to usage right comes down to one habit: check what comes after “to.” It needs to be a noun, a noun phrase, or a pronoun.

Correct structures:

Pattern	Example
Similar to + noun	This recipe is similar to my grandmother’s.
Similar to + pronoun	His approach is similar to mine.
Similar to + noun phrase	The proposal is similar to the one we rejected last year.

A quick trick: try replacing “similar to” with “like.” If the sentence still makes sense, you’ve used it correctly. This car is similar to that one becomes This car is like that one — still works, still means the same thing.

One more note on sentence structure: “similar to” typically sits right after the noun it’s describing, or after a linking verb like “is,” “are,” “seems,” or “looks.” Keeping it close to the noun avoids ambiguity.

What Does “Similarly To” Mean?

Here’s where things get genuinely interesting from a grammar standpoint. The similarly to definition is much narrower than most people assume: it describes a comparable way of doing something — an action or process performed in a manner that resembles another.

“The style guides are fairly united on this one: ‘similarly to’ isn’t wrong, but it’s rarely the best choice. Most editors will quietly swap it for something cleaner.”

Because “similarly” is an adverb, “similarly to” should technically modify a verb, describing how an action was carried out, not what something is.

Example of a technically valid use:

The engine responds similarly to how a smaller model would under the same load.

Here, “similarly” modifies “responds,” a verb — and “to” introduces the comparison of manner. This is grammatically sound, even if it still reads a bit stiffly.

But here’s the catch: in the vast majority of real-world sentences people write, they’re actually comparing two nouns, not two actions. And when that happens, “similarly to” is simply the wrong tool for the job — “similar to” is what they meant all along.

How to Use “Similarly To” Correctly (When It’s Actually Needed)

If you genuinely need to describe a comparable way or action or process, “similarly to” can work, but only under specific conditions.

Sentence pattern:

[Verb] + similarly to + [the way/manner something else happens]

• The new hire adapted similarly to how the last one did.
• The virus spreads similarly to how the flu does.

Even in these cases, though, most style guides and editors prefer cleaner alternatives:

• In the same manner as
• In a similar way to
• Just as
• Much like

So: The virus spreads in a similar way to the flu reads more naturally than the virus spreads similarly to the flu — and it sidesteps the debate entirely.

Bottom line: if you find yourself reaching for “similarly to,” pause and ask whether you’re comparing two nouns. If you are, switch to “similar to.” If you’re truly comparing a manner or process, consider rewording with one of the alternatives above — your writing will read smoother either way.

“Similar To” vs. “Similarly To”: Side-by-Side Comparison

Sometimes a table makes the whole debate click faster than paragraphs of explanation.

Feature	Similar To	Similarly To
Part of speech	Adjective phrase	Adverbial phrase
What it modifies	Nouns, pronouns	Verbs, actions, processes
Common use	Comparing two things	Comparing how two actions happen
Frequency in English	Extremely common	Rare, often reworded
Example	Her coat is similar to mine.	She dressed similarly to how her sister did.
Editor preference	Standard, no issue	Usually flagged, replaced with cleaner phrasing
Correctness rating	Always correct in comparison contexts	Grammatically defensible, but narrow and often avoidable

This table sums up the entire difference between similar and similarly in one glance: one describes things, the other describes actions — and things get compared far more often than actions do.

Comma Rule: “Similarly,” vs. “Similarly To”

This is, honestly, the part search queries about this topic are usually really asking about, even if the phrasing doesn’t show it.

“Similarly,” used at the start of a sentence is a transition word. It’s not part of a comparison phrase at all — it’s a signal to the reader that the next idea echoes the one before it. Think of it as a cousin to “likewise” or “in the same way.”

Similarly, the second study found no significant change in results.

Here, “Similarly,” isn’t comparing two nouns or describing an action’s manner. It’s linking two separate sentences or ideas, showing the reader that what follows resembles what came before.

Compare that to:

It behaved similarly to the first sample.

This is the adverbial use we covered earlier — describing how something behaved, in relation to something else.

The confusion happens because both uses share the same word, and people assume they follow the same rule. They don’t. One is a sentence-starting transition (always followed by a comma), and the other is a comparison of manner (followed directly by “to” and no comma).

Quick test: if removing “similarly” would leave the rest of the sentence intact and meaningful on its own, you’re looking at the transition-word use, and it needs that comma.

Examples of “Similar To” in Sentences

Seeing the phrase in different contexts makes the rule stick far better than definitions alone.

Everyday Examples

• My dog’s personality is similar to a cat’s — independent and a little stubborn.
• This coffee tastes similar to the one from the shop downtown.
• Their apartment layout is similar to ours, just mirrored.

Academic Examples

• The results of this study are similar to those reported by Chen et al. (2021).
• The theoretical framework is similar to Vygotsky’s model of social learning.
• Both samples showed similar characteristics under microscopic analysis.

Workplace Examples

• This role is similar to your previous position, but with more client-facing work.
• Our onboarding process is similar to what most tech startups use.
• The two proposals are similar to each other in scope, though the budgets differ.

Across everyday English, academic writing, and professional communication, the pattern never changes: “similar to” connects nouns, full stop.

Examples of “Similarly To” in Sentences

Real, correctly constructed examples are harder to come by, precisely because the phrase fits so few sentences naturally. Here are cases where it genuinely works:

• The molecule behaves similarly to how it does at lower temperatures.
• He reacted similarly to how his father would have.
• The economy responded similarly to how analysts predicted.

Notice the giveaway again: every one of these compares an action or a behavior, introduced by “how.” Strip out “how,” and most of these sentences would actually read better with “in the same way as” or “just as” instead.

Common Mistakes With Similar and Similarly

Let’s walk through the errors that show up most often, because recognizing the mistake is half the battle.

Mistake 1: Using “Similar” as an Adverb

Wrong: “The device works similar to a smartphone.” Right: “The device works similarly to a smartphone.” Or, better: “The device works like a smartphone.”

When “similar” tries to describe a verb (“works”), it’s playing outside its grammar role. This is one of the most common grammar mistakes in casual writing and speech.

Mistake 2: Using “Similarly” Before a Noun

Wrong: “She has a similarly car to mine.” Right: “She has a similar car to mine.”

Adverbs can’t directly modify nouns. If a noun immediately follows, you need “similar,” not “similarly.”

Mistake 3: Confusing “Similarly,” (Transition) With “Similarly To” (Comparison)

Wrong: “Similarly to, the report noted rising costs.” Right: “Similarly, the report noted rising costs.”

Mixing up the transition word and the comparison phrase creates sentences that just don’t parse correctly.

Mistake 4: Treating the Two Phrases as Interchangeable in Formal Writing

In academic writing and professional communication, precision matters. Swapping “similar to” and “similarly to” without understanding their different grammar roles signals a shaky grasp of English comparison words — something worth avoiding in a thesis, a report, or a client email.

Is “Similarly To” Grammatically Correct?

Yes — in narrow, specific cases. No — as a general substitute for “similar to.”

Grammatically, “similarly to” is defensible when it modifies a verb and compares manner rather than identity. Style guides like APA and Chicago don’t outright ban it, but they lean toward simpler, more direct phrasing whenever possible. Most professional editors will flag “similarly to” during a review and suggest “in the same way as” or a straightforward “similar to,” depending on what the sentence actually needs.

So if you’re asking “is ‘similarly to’ grammatically correct?” — technically, sometimes. Practically, it’s rarely your best choice.

Which One Should You Use? (Decision Guide)

Here’s a fast way to settle it every time:

1. Are you comparing two things (nouns, people, ideas, objects)? Use “similar to.”
2. Are you comparing how an action happens (a process, a behavior, a manner)? Consider,” but check if “in a similar way to” or “just like” reads better.
3. Are you starting a new sentence that echoes the previous idea? Use “Similarly,” followed by a comma — this isn’t a comparison phrase at all.

Ninety percent of the time, you’ll land on step one. That’s simply how often we compare things rather than actions in everyday language.

FAQs

Is “similar to” or “similarly to” correct?

Both can be correct, but they’re not interchangeable. “Similar to” compares nouns and is by far the more common, natural choice. “Similarly to” compares actions or manners and applies in much narrower situations.

What is the difference between similar and similarly?

“Similar” is an adjective describing nouns.” is an adverb describing verbs or actions. That single distinction explains nearly every question people have about similar vs similarly.

Can I use “similar to” and “similarly to” interchangeably?

No. Using them interchangeably leads to grammatically awkward or outright incorrect sentences. Always check whether you’re comparing a noun or an action before choosing.

Is “similarly to” grammatically correct?

It’s correct only when describing how an action happens, and even then, alternatives like “in the same manner as” often read more naturally.

When should I use “similar to”?

Use it whenever you’re comparing two nouns, people, objects, or ideas — this covers the vast majority of comparisons in everyday English.

When should I use “similarly to”?

Reserve it for comparing the manner of an action or process, and only when a cleaner alternative doesn’t fit better.

Which phrase is more common: “similar to” or “similarly to”?

“Similar to” appears far more often in both spoken and written English, since most comparisons involve nouns rather than actions.

Is “similarly as” ever correct?

No. “Similarly as” isn’t standard English. If you’re tempted to write it, you likely want “similarly to,” “in the same way as,” or simply “similar to,” depending on what’s being compared.

Conclusion

The difference between similar to and similarly to boils down to one question: are you comparing things, or comparing actions? Nouns pair with “similar to.” Verbs, in the rare cases they need this kind of comparison, pair with “similarly to” — though a cleaner phrase usually does the job better.

Next time you pause mid-sentence over this exact choice, run through the decision guide above. It takes about three seconds, and it’ll save you from one of the more common grammar mistakes in correct English usage. Once the adjective-versus-adverb distinction clicks, you’ll never second-guess this pair again.