oivsoitoTell them apart

Quick tell: oi is a intj, oito is an adjective, so they fill different roles in a sentence.

Which to use

“oi” is an intj and “oito” is an adjective - they look or sound alike but fill different roles in a sentence.

#631
“oi” frequency rank
#1,099
“oito” frequency rank
1730
confusion score

Side-by-Side Comparison

Feature oi oito
Definition expressa cumprimento que se faz ao encontrar uma pessoa número equivalente a sete mais um; cardinalidade de um conjunto que contenha oito elementos distintos, representado pelo símbolo 8 (algarismos arábicos) ou VIII (algarismos romanos)

Letter map: oi vs oito

Shared letters muted; letters that set oi and oito apart highlighted. Shared run: 2. oi runs 2 letters (VV) against oito's 4 (VVCV) - the length gap alone is often enough to separate them once you know to check it.

2 ch
oi
4 ch
oito

Role in the sentence - oi and oito

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: oi is anintj and oitoanadjective. On the page they differ by 2 extra letter(s) - “oi” sits inside “oito”. Our composite confusion score for this pair is 1730, derived from the frequency rank of both members and their visual similarity.

oi is recorded at frequency rank #631, classified as anintj. oito is at rank #1,099, tagged as anadj, pronounced /ˈoj.tu/.

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 1730, this pair ranks #73,777 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of oi vs oito

Shared letters: io. Private to "oi": -. Private to "oito": t.

"oi" · 2 letters · shape VV  ·  "oito" · 4 letters · shape VVCV

Known mistypes of this pair

  • oito ← ioto · oiot · oitto · otio

Frequently Asked Questions

Is swapping "oi" for "oito" ever safe?
No - they are not even the same part of speech. "oi" is an intj and "oito" an adjective, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "oi" vs "oito" - which ranks higher?
"oi" is the more common of the two: it sits at frequency rank #631 in our Portuguese list, against #1,099 for "oito". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

You've compared "oi" and "oito". Here's where to go from here.

  • Full dictionary entry for "oi" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "oito" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #73,777 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "oi" and "oito" also get mixed up with nearby pairs, the highest-scored neighbour is "oi vs oni". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #73,777 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