s vs sim, What's the Difference?

Which to use

“s” is a symbol and “sim” is an adverb - they look or sound alike but fill different roles in a sentence.

#511
“s” frequency rank: #147
“sim” frequency rank: 658
confusion score

Side-by-Side Comparison

Feature	s	sim
Definition	símbolo de segundo	exprime afirmação, acordo, aprovação, permissão ou consentimento

Letter map: s vs sim

Shared letters muted; letters that set s and sim apart highlighted. Shared run: 1.

1 ch

3 ch

sim

Part-of-speech tell for s / sim

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: s is asymbol and simanadverb. On the page they differ by 2 extra letter(s) - “s” sits inside “sim”. Our composite confusion score for this pair is 658, derived from the frequency rank of both members and their visual similarity.

s is recorded at frequency rank #511, classified as asymbol. sim is at rank #147, tagged as anadv, pronounced /ˈsĩ/.

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 658, this pair ranks #75,013 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of s vs sim

Shared letters: s. Private to "s": -. Private to "sim": im.

"s" · 1 letters · shape C · "sim" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "s" for "sim" ever safe?

No - they are not even the same part of speech. "s" is a symbol and "sim" an adverb, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "s" or "sim"?

"sim" is the more common of the two: it sits at frequency rank #147 in our Portuguese list, against #511 for "s". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pair "s" vs "sim" is on the table, pick a follow-up below.

Full dictionary entry for "s" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "sim" - compare definitions side by side with the headword page. Word entry
This pair ranks #75,013 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"s" and "sim" also get mixed up with nearby pairs, the highest-scored neighbour is "s vs Sau". Nearby pair

Confusion rank #75,013 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.