I vs íon, What's the Difference?

Which to use

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

#286
“I” frequency rank: #44,174
“íon” frequency rank: 44460
confusion score

Side-by-Side Comparison

Feature	I	íon
Definition	caso nominativo da primeira pessoa do singular, eu	espécie química eletricamente carregada, geralmente um átomo ou molécula que perdeu ou ganhou elétrons

Letter map: I vs íon

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

1 ch

3 ch

íon

Grammar separator: I vs íon

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: I is apronoun and íonanoun. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 44460, derived from the frequency rank of both members and their visual similarity.

I is recorded at frequency rank #286, classified as apron, pronounced /aI/. 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 44460, this pair ranks #21,020 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of I vs íon

Shared letters: none. Private to "I": i. Private to "íon": noí.

"I" · 1 letters · shape V · "íon" · 3 letters · shape VVC

Frequently Asked Questions

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

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

Which is more common, "I" or "íon"?

"I" is the more common of the two: it sits at frequency rank #286 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.

After this comparison

Done with this confusable. These links stay specific to "I" and "íon".

Full dictionary entry for "I" 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 #21,020 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"I" and "íon" also get mixed up with nearby pairs, the highest-scored neighbour is "ino vs íon". Nearby pair

Confusion rank #21,020 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.