Significant vs Worthwhile

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

Significant

Top 1,000 (very common)B2adjective

Worthwhile

Top 3,000 (common)C1adjective
Most common: Significant
 SignificantWorthwhile
Pronunciation🇬🇧 /["/sɪɡˈnɪfɪkənt/"]/🇺🇸 /["/sɪɡˈnɪfɪkənt/"]/🇬🇧 /["/ˌwɜːθˈwaɪl/"]/🇺🇸 /["/ˌwɜːrθˈwaɪl/"]/
MeaningImportant or meaning a lot.Something that is important or has good value.
ExampleThe research showed a significant improvement in patient outcomes.Volunteering at the local shelter was a worthwhile experience that taught me the value of community service.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 3,000 (common)
CEFR levelB2C1
Part of speechadjectiveadjective
Collocationsbe, prove, become, extremely, fairly, very, for, tobe, seem, become, extremely, particularly, really
Antonymsinsignificant, trivial, minorpointless, useless, unimportant
Common mistakesConfusing 'significant' with 'significance'., Using 'significant' as a noun instead of an adjective., Overusing 'significant' in casual speaking.Using 'worthwhile' as a standalone adjective without a noun., Confusing 'worthwhile' with 'worth' and omitting necessary grammatical structure., 'Worthwhile' used in overly casual situations.
Usage notesUsed in academic and formal contexts to indicate importance. Avoid in very casual conversations; instead, use simpler words like 'big' or 'important'.Use 'worthwhile' to describe activities or efforts that have meaningful results. Avoid using it in very casual contexts where a simpler word like 'good' may be more appropriate.

Frequently asked questions: Significant vs Worthwhile

What's the difference between Significant and Worthwhile?

Significant: Important or meaning a lot. Worthwhile: Something that is important or has good value.

Which is more common: Significant and Worthwhile?

Significant is the most common in everyday English.

Are Significant and Worthwhile the same CEFR level?

Significant: B2, Worthwhile: C1 on the CEFR scale.

Can I use Significant and Worthwhile interchangeably?

Not always. Significant and Worthwhile 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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