okvsosWhat's the difference?

Quick tell: ok is a num, os is an article, so they fill different roles in a sentence.

Which to use

“ok” is a num and “os” is an article - they look or sound alike but fill different roles in a sentence.

#1,033
“ok” frequency rank
#19
“os” frequency rank
1052
confusion score

Side-by-Side Comparison

Feature ok os
Definition oito usado para apontar um nome definido, único

Letter map: ok vs os

Shared letters muted; letters that set ok and os apart highlighted. Shared run: 1.

2 ch
ok
2 ch
os

Role in the sentence - ok and os

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ok is anum and osanarticle. On the page they differ by a single letter - k in “ok” becomes s in “os”. Our composite confusion score for this pair is 1052, derived from the frequency rank of both members and their visual similarity.

ok is recorded at frequency rank #1,033, classified as anum. os is at rank #19, tagged as anarticle, pronounced /uʃ/, /us/ (menos frequente); enfático: /oʃ/, /os/ (menos frequente).

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 1052, this pair ranks #74,576 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ok vs os

Shared letters: o. Private to "ok": k. Private to "os": s.

"ok" · 2 letters · shape VC  ·  "os" · 2 letters · shape VC

Frequently Asked Questions

Can "ok" and "os" be used interchangeably?
No - they are not even the same part of speech. "ok" is a num and "os" an article, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "ok" or "os"?
"os" is the more common of the two: it sits at frequency rank #19 in our Portuguese list, against #1,033 for "ok". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Done with this confusable. These links stay specific to "ok" and "os".

  • Full dictionary entry for "ok" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "os" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #74,576 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "ok" and "os" also get mixed up with nearby pairs, the highest-scored neighbour is "ok vs oni". Nearby pair

Confusion rank #74,576 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list