íon vs is, What's the Difference?

Which to use

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

#44,174
“íon” frequency rank: #1,709
“is” frequency rank: 45883
confusion score

Side-by-Side Comparison

Feature	íon	is
Definition	espécie química eletricamente carregada, geralmente um átomo ou molécula que perdeu ou ganhou elétrons	contração de agus; e

Letter map: íon vs is

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

3 ch

íon

2 ch

Role in the sentence - íon and is

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: íon is anoun and isaverb. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 45883, derived from the frequency rank of both members and their visual similarity.

íon is recorded at frequency rank #44,174, classified as anoun. is is at rank #1,709, tagged as averb.

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 45883, this pair ranks #19,500 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of íon vs is

Shared letters: none. Private to "íon": noí. Private to "is": is.

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

Frequently Asked Questions

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

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

Which is more common, "íon" or "is"?

"is" is the more common of the two: it sits at frequency rank #1,709 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 "íon" and "is". Here's where to go from here.

Full dictionary entry for "íon" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "is" - compare definitions side by side with the headword page. Word entry
This pair ranks #19,500 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"íon" and "is" also get mixed up with nearby pairs, the highest-scored neighbour is "ino vs íon". Nearby pair

Confusion rank #19,500 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.