Which to use
“tarn” is a noun and “thon” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #47,370
- “tarn” frequency rank
- #34,717
- “thon” frequency rank
- 82087
- confusion score
Side-by-Side Comparison
| Feature | tarn | thon |
|---|---|---|
| Definition | A small mountain lake, especially in Northern England. | they (singular). Gender-neutral third-person singular subject pronoun, coordinate with gendered pronouns he and she. |
Where the eye mixes tarn and thon
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. tarn (CVCC) and thon (CCVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Look-alike desk: tarn vs thon
These two trip readers on the page rather than in the ear: tarn is /tɑːn/ while thon is /ðʌn/. 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 (noun vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 82087, derived from the frequency rank of both members and their visual similarity.
tarn is recorded at frequency rank #47,370, classified as anoun, pronounced /tɑːn/. thon is at rank #34,717, tagged as apron, pronounced /ðʌn/.
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 82087, this pair ranks #16,420 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of tarn vs thon
Shared letters: nt. Private to "tarn": ar. Private to "thon": ho.
"tarn" · 4 letters · shape CVCC · "thon" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Can "tarn" and "thon" be used interchangeably?
Which is more common, "tarn" or "thon"?
Useful next steps
Eye-level mix-up between "tarn" and "thon" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "tarn" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "thon" - compare definitions side by side with the headword page. Word entry
- This pair ranks #16,420 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "tarn" and "thon" also get mixed up with nearby pairs, the highest-scored neighbour is "Taf vs tarn". 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 #16,420 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.