sec vs su, What's the Difference?

Which to use

“sec” and “su” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#19,268
“sec” frequency rank: #6,713
“su” frequency rank: 25981
confusion score

Side-by-Side Comparison

Feature	sec	su
Definition	seco	dele

Letter map: sec vs su

Shared letters muted; letters that set sec and su apart highlighted. Shared run: 1.

3 ch

sec

2 ch

Corpus notes: sec and su

sec and su are indexed as a confusable Portuguese pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 25981, derived from the frequency rank of both members and their visual similarity.

sec is recorded at frequency rank #19,268, classified as anadj, pronounced \sɛk\. su is at rank #6,713, tagged as anadj.

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 25981, this pair ranks #43,243 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sec vs su

Shared letters: s. Private to "sec": ce. Private to "su": u.

"sec" · 3 letters · shape CVC · "su" · 2 letters · shape CV

Frequently Asked Questions

Do "sec" and "su" mean the same thing in a sentence?

No. They differ by 1 letter(s) in length, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

Which is more common, "sec" or "su"?

"su" is the more common of the two: it sits at frequency rank #6,713 in our Portuguese list, against #19,268 for "sec". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Done with this confusable. These links stay specific to "sec" and "su".

Full dictionary entry for "sec" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "su" - compare definitions side by side with the headword page. Word entry
This pair ranks #43,243 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"sec" and "su" also get mixed up with nearby pairs, the highest-scored neighbour is "Sau vs sec". Nearby pair

Confusion rank #43,243 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.