Comparison vs Similarity

When to use each in English, with meaning, register, and examples.

Comparison

Top 1,000 (very common)B1noun

Similarity

Top 1,000 (very common)B1noun
 ComparisonSimilarity
Pronunciation🇬🇧 /["/kəmˈpærɪsn/"]/🇺🇸 /["/kəmˈpærɪsn/"]/🇬🇧 /["/ˌsɪməˈlærəti/"]/🇺🇸 /["/ˌsɪməˈlærəti/"]/
MeaningLooking at how things are similar or different.The way two things are alike or share qualities.
ExampleThe comparison between the two models shows a significant difference in performance.The similarity between the two paintings is striking.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelB1B1
Part of speechnounnoun
Collocationsfavourable/​favorable, unfavourable/​unfavorable, fair, draw, make, perform, by comparison (with), for comparison, in comparison to, a basis for comparison, a point of comparison, for the purposes of comparison, favourable/​favorable, unfavourable/​unfavorable, fair, draw, make, perform, by comparison (with), for comparison, in comparison to, a basis for comparison, a point of comparison, for the purposes of comparisonclose, considerable, great, degree, bear, have, reveal, exist, end, similarity between, similarity in, similarity to, a point of similarity, close, considerable, great, degree, bear, have, reveal, exist, end, similarity between, similarity in, similarity to, a point of similarity
Antonymscontrast, dissimilaritydifference, dissimilarity
Common mistakesConfused with 'comparative' — remember 'comparison' is the act., Using 'compare' instead of 'comparison' in noun form., Incorrectly using 'comparison' with verbs.Confused with 'similar' which is an adjective., Using 'similarity' incorrectly in plural form., Overusing it when 'commonality' or 'likeness' might be more appropriate.
Usage notesUse 'comparison' in academic or analytical contexts. It's appropriate for discussions about similarities and differences but less common in casual conversation.Used when discussing comparisons between things, especially in contexts like science, literature, or everyday conversations. It is often avoided in casual slang settings.

Frequently asked questions: Comparison vs Similarity

What's the difference between Comparison and Similarity?

Comparison: Looking at how things are similar or different. Similarity: The way two things are alike or share qualities.

Are Comparison and Similarity the same CEFR level?

Comparison: B1, Similarity: B1 on the CEFR scale.

What part of speech are Comparison and Similarity?

Comparison: noun, Similarity: noun.

Can you show an example of each?

Comparison: The comparison between the two models shows a significant difference in performance. Similarity: The similarity between the two paintings is striking.

Can I use Comparison and Similarity interchangeably?

Not always. Comparison and Similarity are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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