ia vs íon, What's the Difference?

Which to use

“ia” is a verb and “íon” is a noun - they look or sound alike but fill different roles in a sentence.

#600
“ia” frequency rank: #44,174
“íon” frequency rank: 44774
confusion score

Side-by-Side Comparison

Feature	ia	íon
Definition	primeira pessoa do singular do pretérito imperfeito do indicativo do verbo ir	espécie química eletricamente carregada, geralmente um átomo ou molécula que perdeu ou ganhou elétrons

Letter map: ia vs íon

Shared letters muted; letters that set ia and íon apart highlighted. No shared letter run.

2 ch

3 ch

íon

Part-of-speech tell for ia / íon

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ia is averb and íonanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 44774, derived from the frequency rank of both members and their visual similarity.

ia is recorded at frequency rank #600, classified as averb, pronounced /ˈi.ɐ/. íon is at rank #44,174, tagged as anoun.

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 44774, this pair ranks #20,659 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ia vs íon

Shared letters: none. Private to "ia": ai. Private to "íon": noí.

"ia" · 2 letters · shape VV · "íon" · 3 letters · shape VVC

Frequently Asked Questions

Can "ia" and "íon" be used interchangeably?

No - they are not even the same part of speech. "ia" is a verb and "íon" a noun, so a sentence built for one is usually ungrammatical with the other.

In ordinary Portuguese text, does "ia" or "íon" show up more?

"ia" is the more common of the two: it sits at frequency rank #600 in our Portuguese list, against #44,174 for "íon". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

You've compared "ia" and "íon". Here's where to go from here.

Full dictionary entry for "ia" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "íon" - compare definitions side by side with the headword page. Word entry
This pair ranks #20,659 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"ia" and "íon" also get mixed up with nearby pairs, the highest-scored neighbour is "ino vs íon". Nearby pair

Confusion rank #20,659 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.