Which to use
“their” is an adjective and “this” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #19,269
- “their” frequency rank
- #4,753
- “this” frequency rank
- 24022
- confusion score
Side-by-Side Comparison
| Feature | their | this |
|---|---|---|
| Definition | Su, sus (de ellos o de ellas, o de una persona cuando no se conoce su sexo). | Este, esta. |
Where the eye mixes their and this
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between their and this
These two trip readers on the page rather than in the ear: their is /ðɛə(ɹ)/ while this is /ðɪs/. 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 (adjective vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 24022, derived from the frequency rank of both members and their visual similarity.
their is recorded at frequency rank #19,269, classified as anadj, pronounced /ðɛə(ɹ)/. this is at rank #4,753, tagged as apron, pronounced /ðɪs/.
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 24022, this pair ranks #243,058 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of their vs this
Shared letters: hit. Private to "their": er. Private to "this": s.
"their" · 5 letters · shape CCVVC · "this" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Do "their" and "this" mean the same thing in a sentence?
Which is more common, "their" or "this"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "their" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "this" - compare definitions side by side with the headword page. Word entry
- This pair ranks #243,058 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "their" and "this" also get mixed up with nearby pairs, the highest-scored neighbour is "their vs theme". 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 #243,058 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.