o vs olá, What's the Difference?

Which to use

“o” is an article and “olá” is an intj - they look or sound alike but fill different roles in a sentence.

#3
“o” frequency rank: #1,198
“olá” frequency rank: 1201
confusion score

Side-by-Side Comparison

Feature	o	olá
Definition	partícula gramatical usada antes de substantivos ou palavras substantivadas; por geral indica uma coisa em particular	usa-se ao encontrar alguém, como saudação

Where the eye mixes o and olá

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

1 ch

3 ch

olá

Visual trap between o and olá

These two trip readers on the page rather than in the ear: o is /u/ while olá is /o.'la/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “o” sits inside “olá”, and the parts of speech differ too (article vs intj), which is usually the fastest check. Our composite confusion score for this pair is 1201, derived from the frequency rank of both members and their visual similarity.

o is recorded at frequency rank #3, classified as anarticle, pronounced /u/. olá is at rank #1,198, tagged as anintj, pronounced /o.'la/.

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 1201, this pair ranks #74,391 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of o vs olá

Shared letters: o. Private to "o": -. Private to "olá": lá.

"o" · 1 letters · shape V · "olá" · 3 letters · shape VCV

Frequently Asked Questions

Is swapping "o" for "olá" ever safe?

No - they are not even the same part of speech. "o" is an article and "olá" an intj, so a sentence built for one is usually ungrammatical with the other.

Frequency check: "o" vs "olá" - which ranks higher?

"o" is the more common of the two: it sits at frequency rank #3 in our Portuguese list, against #1,198 for "olá". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Eye-level mix-up between "o" and "olá" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "o" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "olá" - compare definitions side by side with the headword page. Word entry
This pair ranks #74,391 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"o" and "olá" also get mixed up with nearby pairs, the highest-scored neighbour is "olá vs oni". Nearby pair

Confusion rank #74,391 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.