Which to use
“decisive” is an adjective and “decisively” is an adverb - they look or sound alike but fill different roles in a sentence.
- #9,593
- “decisive” frequency rank
- #24,722
- “decisively” frequency rank
- 34315
- confusion score
Side-by-Side Comparison
| Feature | decisive | decisively |
|---|---|---|
| Definition | Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive. | In a decisive manner. |
Where the spellings diverge
Shared letters are muted; the letters that actually set decisive and decisively apart are highlighted. They share 8 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
decisive and decisively form a confusable pair in the English index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by 2 extra letter(s) - “decisive” sits inside “decisively” - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 34315, derived from the frequency rank of both members and their visual similarity.
decisive is recorded at frequency rank #9,593, classified as anadj, pronounced /dɪˈsaɪsɪv/. decisively is at rank #24,722, tagged as anadv, pronounced /dɪˈsaɪsɪvli/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 34315, this pair ranks #321,867 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Frequency comparison
Frequently Asked Questions
Can "decisive" and "decisively" be used interchangeably?
Remembering decisive vs decisively
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “decisive”; for an adverb, it's “decisively”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “decisive” entry
- Browse more pairs most likely to be confused. Most confusable