Which to use
“nine” and “ninety” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #1,431
- “nine” frequency rank
- #11,078
- “ninety” frequency rank
- 12509
- confusion score
Side-by-Side Comparison
| Feature | nine | ninety |
|---|---|---|
| Definition | A numerical value equal to 9; the number following eight and preceding ten. | The cardinal number occurring after eighty-nine and before ninety-one, represented in Roman numerals as XC and in Arabic numerals as 90. |
Where the eye mixes nine and ninety
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. nine runs 4 letters (CVCV) against ninety's 6 (CVCVCV) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: nine vs ninety
A purely visual mix-up. nine (/naɪn/) and ninety (/ˈnaɪn.ti/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 extra letter(s) - “nine” sits inside “ninety”. Our composite confusion score for this pair is 12509, derived from the frequency rank of both members and their visual similarity.
nine is recorded at frequency rank #1,431, classified as anum, pronounced /naɪn/. ninety is at rank #11,078, tagged as anum, pronounced /ˈnaɪn.ti/.
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 12509, this pair ranks #481,163 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of nine vs ninety
Shared letters: ein. Private to "nine": -. Private to "ninety": ty.
"nine" · 4 letters · shape CVCV · "ninety" · 6 letters · shape CVCVCV
Known mistypes of this pair
Frequently Asked Questions
Do "nine" and "ninety" mean the same thing in a sentence?
Frequency check: "nine" vs "ninety" - which ranks higher?
Useful next steps
Eye-level mix-up between "nine" and "ninety" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "nine" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ninety" - compare definitions side by side with the headword page. Word entry
- This pair ranks #481,163 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "nine" and "ninety" also get mixed up with nearby pairs, the highest-scored neighbour is "naivety vs ninety". 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
Confusion rank #481,163 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.