Which to use
“inch” is a noun and “ith” is an adjective - they look or sound alike but fill different roles in a sentence.
- #3,067
- “inch” frequency rank
- #49,435
- “ith” frequency rank
- 52502
- confusion score
Side-by-Side Comparison
| Feature | inch | ith |
|---|---|---|
| Definition | An English unit of length equal to 1/12 of a foot or 2.54 cm, conceived as roughly the width of a thumb. | Occurring at position i in a sequence. |
Where the eye mixes inch and ith
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between inch and ith
These two trip readers on the page rather than in the ear: inch is /ɪnt͡ʃ/ while ith is /aɪθ/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 52502, derived from the frequency rank of both members and their visual similarity.
inch is recorded at frequency rank #3,067, classified as anoun, pronounced /ɪnt͡ʃ/. ith is at rank #49,435, tagged as anadj, pronounced /aɪθ/.
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 52502, this pair ranks #156,507 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of inch vs ith
Shared letters: hi. Private to "inch": cn. Private to "ith": t.
"inch" · 4 letters · shape VCCC · "ith" · 3 letters · shape VCC
Known mistypes of this pair
- inch ← icnh · incch · inchh · inhc · innch · nich
Frequently Asked Questions
Can "inch" and "ith" be used interchangeably?
In ordinary English text, does "inch" or "ith" show up more?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "inch" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ith" - compare definitions side by side with the headword page. Word entry
- This pair ranks #156,507 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "inch" and "ith" also get mixed up with nearby pairs, the highest-scored neighbour is "ISR vs ith". 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 #156,507 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.