Which to use
“io” is an adverb and “iodo” is a noun - they look or sound alike but fill different roles in a sentence.
- #18,900
- “io” frequency rank
- #27,142
- “iodo” frequency rank
- 46042
- confusion score
Side-by-Side Comparison
| Feature | io | iodo |
|---|---|---|
| Definition | sempre | elemento químico de símbolo I, possui o número atômico 53 e massa atômica relativa 126,904 u; é um não-metal, halogênio, de cor negra; apesar de abundante, não é encontrado livre na natureza, ocorrendo principalmente na forma de iodetos e iodatos em rochas, solos, água do mar e depósitos de sal; é utilizado principalmente na medicina, como desinfetante; é um elemento essencial para o corpo humano; sua falta provoca o hipotiroidismo causando o bócio e a mixedema |
Where the eye mixes io and iodo
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between io and iodo
These two trip readers on the page rather than in the ear: io is /ˈi.o/, /ˈi.ɔ/ while iodo is /ˈjo.du/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “io” sits inside “iodo”, and the parts of speech differ too (adverb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 46042, derived from the frequency rank of both members and their visual similarity.
io is recorded at frequency rank #18,900, classified as anadv, pronounced /ˈi.o/, /ˈi.ɔ/. iodo is at rank #27,142, tagged as anoun, pronounced /ˈjo.du/.
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 46042, this pair ranks #19,324 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of io vs iodo
Shared letters: io. Private to "io": -. Private to "iodo": d.
"io" · 2 letters · shape VV · "iodo" · 4 letters · shape VVCV
Known mistypes of this pair
- iodo ← idoo · ioddo · iood · oido
Frequently Asked Questions
Do "io" and "iodo" mean the same thing in a sentence?
Frequency check: "io" vs "iodo" - which ranks higher?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "io" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "iodo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #19,324 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "io" and "iodo" also get mixed up with nearby pairs, the highest-scored neighbour is "ino vs iodo". 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 #19,324 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.