Which to use
“su” is a verb and “sum” is a noun - they look or sound alike but fill different roles in a sentence.
- #1,609
- “su” frequency rank
- #30,825
- “sum” frequency rank
- 32434
- confusion score
Side-by-Side Comparison
| Feature | su | sum |
|---|---|---|
| Definition | Participe passé masculin singulier du verbe savoir. | Unité monétaire utilisée en Ouzbékistan |
Where the eye mixes su and sum
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses su with sum
These two trip readers on the page rather than in the ear: su is \sy\ while sum is \sum\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 extra letter(s) - “su” sits inside “sum”, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 32434, derived from the frequency rank of both members and their visual similarity.
su is recorded at frequency rank #1,609, classified as averb, pronounced \sy\. sum is at rank #30,825, tagged as anoun, pronounced \sum\.
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 32434, this pair ranks #297,309 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of su vs sum
Shared letters: su. Private to "su": -. Private to "sum": m.
"su" · 2 letters · shape CV · "sum" · 3 letters · shape CVC
Frequently Asked Questions
Do "su" and "sum" mean the same thing in a sentence?
In ordinary French text, does "su" or "sum" show up more?
After this comparison
Eye-level mix-up between "su" and "sum" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "su" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sum" - compare definitions side by side with the headword page. Word entry
- This pair ranks #297,309 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "su" and "sum" also get mixed up with nearby pairs, the highest-scored neighbour is "sum vs suu". Nearby pair
Confusion rank #297,309 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.