in vs íon, What's the Difference?

Which to use

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

#269
“in” frequency rank: #44,174
“íon” frequency rank: 44443
confusion score

Side-by-Side Comparison

Feature	in	íon
Definition	em	espécie química eletricamente carregada, geralmente um átomo ou molécula que perdeu ou ganhou elétrons

Letter map: in vs íon

Shared letters muted; letters that set in and íon apart highlighted. Shared run: 1.

2 ch

3 ch

íon

Part-of-speech tell for in / íon

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: in is apreposition and íonanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 44443, derived from the frequency rank of both members and their visual similarity.

in is recorded at frequency rank #269, classified as aprep. 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 44443, this pair ranks #21,045 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of in vs íon

Shared letters: n. Private to "in": i. Private to "íon": oí.

"in" · 2 letters · shape VC · "íon" · 3 letters · shape VVC

Frequently Asked Questions

Do "in" and "íon" mean the same thing in a sentence?

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

Which is more common, "in" or "íon"?

"in" is the more common of the two: it sits at frequency rank #269 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

Pair "in" vs "íon" is on the table, pick a follow-up below.

Full dictionary entry for "in" 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 #21,045 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"in" and "íon" also get mixed up with nearby pairs, the highest-scored neighbour is "ino vs íon". Nearby pair

Confusion rank #21,045 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.