Which to use
“occasion” is a noun and “occasional” is an adjective - they look or sound alike but fill different roles in a sentence.
- #3,771
- “occasion” frequency rank
- #5,896
- “occasional” frequency rank
- 9667
- confusion score
Side-by-Side Comparison
| Feature | occasion | occasional |
|---|---|---|
| Definition | A favorable opportunity; a convenient or timely chance. | Occurring or appearing irregularly from time to time, but not often; incidental. |
Where the eye mixes occasion and occasional
Muted = shared; highlighted = the visual trap. They share 8 letters in sequence.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: occasion is /əˈkeɪʒən/ while occasional is /əˈkeɪʒ(ə)nəl/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “occasion” sits inside “occasional”, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 9667, derived from the frequency rank of both members and their visual similarity.
occasion is recorded at frequency rank #3,771, classified as anoun, pronounced /əˈkeɪʒən/. occasional is at rank #5,896, tagged as anadj, pronounced /əˈkeɪʒ(ə)nəl/.
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 9667, this pair ranks #496,232 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of occasion vs occasional
Shared letters: acinos. Private to "occasion": -. Private to "occasional": l.
"occasion" · 8 letters · shape VCCVCVVC · "occasional" · 10 letters · shape VCCVCVVCVC
Known mistypes of this pair
- occasion ← cocasion · ocacsion · ocasion · occaison · occasino · occasionn · occasoin · occassion
- occasional ← cocasional · ocacsional · ocasional · occaisonal · occasinoal · occasioanl · occasionall · occasionla
Frequently Asked Questions
Can "occasion" and "occasional" be used interchangeably?
Which is more common, "occasion" or "occasional"?
What to do next
You've compared "occasion" and "occasional". Here's where to go from here.
- Full dictionary entry for "occasion" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "occasional" - compare definitions side by side with the headword page. Word entry
- This pair ranks #496,232 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "occasion" and "occasional" also get mixed up with nearby pairs, the highest-scored neighbour is "occasional vs occasioned". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.