Considerably vs Significantly

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

Considerably

Top 1,000 (very common)B2adverb

Significantly

Top 2,000 (common)B2adverb
Most common: Considerably
 ConsiderablySignificantly
Pronunciation🇬🇧 /["/kənˈsɪdərəbli/"]/🇺🇸 /["/kənˈsɪdərəbli/"]/🇬🇧 /["/sɪɡˈnɪfɪkəntli/"]/🇺🇸 /["/sɪɡˈnɪfɪkəntli/"]/
MeaningA lot; to a great extent.More than a little or in an important way.
ExampleThe need for sleep varies considerably from person to person.The results of the study indicated that significantly more people preferred the new product over the old one.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelB2B2
Part of speechadverbadverb
Collocationsconsiderably higher, considerably lower, considerably improved, considerably more, considerably bettersignificantly increase, significantly improve, significantly different, significantly affect
Antonymsslightly, marginally, insignificantly, minimallyinsignificantly, slightly
Common mistakesConfusing with 'consider' which means to think about something., Using 'considerably' without an adjective/adverb to modify., Misplacing 'considerably' in a sentence, affecting the meaning.Using 'significantly' when 'slightly' is more appropriate in context., Confusing 'significantly' with 'significative' which is not commonly used., Placing it incorrectly in a sentence, for example, at the end instead of before the word it modifies.
Usage notesUse 'considerably' in more formal contexts, such as reports or academic writing. It may not be suitable for very casual conversations.Use 'significantly' in formal writing or speech to show importance. Avoid in casual conversation unless emphasizing a major point.

Frequently asked questions: Considerably vs Significantly

What's the difference between Considerably and Significantly?

Considerably: A lot; to a great extent. Significantly: More than a little or in an important way.

Which is more common: Considerably and Significantly?

Considerably is the most common in everyday English.

Are Considerably and Significantly the same CEFR level?

Considerably: B2, Significantly: B2 on the CEFR scale.

Can I use Considerably and Significantly interchangeably?

Not always. Considerably and Significantly 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.