Which to use
“their” is a determiner and “Thi” is a name - they look or sound alike but fill different roles in a sentence.
- #56
- “their” frequency rank
- #23,700
- “Thi” frequency rank
- 23756
- confusion score
Side-by-Side Comparison
| Feature | their | Thi |
|---|---|---|
| Definition | Belonging to, from, of, or relating to, them (plural). | A surname from Vietnamese. |
Letter map: their vs Thi
Shared letters muted; letters that set their and Thi apart highlighted. Shared run: 3. their runs 5 letters (CCVVC) against Thi's 3 (CCV) - the length gap alone is often enough to separate them once you know to check it.
Role in the sentence - their and Thi
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: their is adeterminer and Thianame. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 23756, derived from the frequency rank of both members and their visual similarity.
their is recorded at frequency rank #56, classified as adet, pronounced /ðɛə/. Thi is at rank #23,700, tagged as aname.
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 23756, this pair ranks #406,996 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of their vs Thi
Shared letters: hit. Private to "their": er. Private to "Thi": -.
"their" · 5 letters · shape CCVVC · "Thi" · 3 letters · shape CCV
Known mistypes of this pair
- their ← hteir · tehir · theirr · theri · thheir · ttheir
Frequently Asked Questions
Is swapping "their" for "Thi" ever safe?
In ordinary English text, does "their" or "Thi" show up more?
After this comparison
Done with this confusable. These links stay specific to "their" and "Thi".
- Full dictionary entry for "their" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "Thi" - compare definitions side by side with the headword page. Word entry
- This pair ranks #406,996 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "their" and "Thi" also get mixed up with nearby pairs, the highest-scored neighbour is "Taf vs Thi". 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 #406,996 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.