Which to use
“thirty” is a num and “twisty” is an adjective - they look or sound alike but fill different roles in a sentence.
- #3,791
- “thirty” frequency rank
- #40,490
- “twisty” frequency rank
- 44281
- confusion score
Side-by-Side Comparison
| Feature | thirty | twisty |
|---|---|---|
| Definition | The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30. | Characterised by a twist or twists; twisting. |
Where the eye mixes thirty and twisty
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Visual trap between thirty and twisty
These two trip readers on the page rather than in the ear: thirty is /ˈθɜːti/ while twisty is /ˈtwɪsti/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (num vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 44281, derived from the frequency rank of both members and their visual similarity.
thirty is recorded at frequency rank #3,791, classified as anum, pronounced /ˈθɜːti/. twisty is at rank #40,490, tagged as anadj, pronounced /ˈtwɪsti/.
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 44281, this pair ranks #232,081 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of thirty vs twisty
Shared letters: ity. Private to "thirty": hr. Private to "twisty": sw.
"thirty" · 6 letters · shape CCVCCV · "twisty" · 6 letters · shape CCVCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "thirty" for "twisty" ever safe?
Frequency check: "thirty" vs "twisty" - which ranks higher?
Useful next steps
Eye-level mix-up between "thirty" and "twisty" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "thirty" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "twisty" - compare definitions side by side with the headword page. Word entry
- This pair ranks #232,081 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "thirty" and "twisty" also get mixed up with nearby pairs, the highest-scored neighbour is "toasty vs twisty". 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 #232,081 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.