Which to use
“sun” is a noun and “sure” is an adjective - they look or sound alike but fill different roles in a sentence.
- #8,323
- “sun” frequency rank
- #42,717
- “sure” frequency rank
- 51040
- confusion score
Side-by-Side Comparison
| Feature | sun | sure |
|---|---|---|
| Definition | Sol₂. | Seguro, convencido. |
Where the eye mixes sun and sure
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Look-alike desk: sun vs sure
These two trip readers on the page rather than in the ear: sun is /sʌn/ while sure is /ʃʊə/ (fusión pour–poor). 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 51040, derived from the frequency rank of both members and their visual similarity.
sun is recorded at frequency rank #8,323, classified as anoun, pronounced /sʌn/. sure is at rank #42,717, tagged as anadj, pronounced /ʃʊə/ (fusión pour–poor).
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 51040, this pair ranks #99,995 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of sun vs sure
Shared letters: su. Private to "sun": n. Private to "sure": er.
"sun" · 3 letters · shape CVC · "sure" · 4 letters · shape CVCV
Known mistypes of this pair
- sure ← srue · ssure · surre
Frequently Asked Questions
Is swapping "sun" for "sure" ever safe?
Which is more common, "sun" or "sure"?
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 "sun" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sure" - compare definitions side by side with the headword page. Word entry
- This pair ranks #99,995 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "sun" and "sure" also get mixed up with nearby pairs, the highest-scored neighbour is "sari vs sure". 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 #99,995 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.