Reis vs ruir, What's the Difference?

Which to use

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

#3,514
“Reis” frequency rank: #34,026
“ruir” frequency rank: 37540
confusion score

Side-by-Side Comparison

Feature	Reis	ruir
Definition	sobrenome comum em português	desmoronar, desabar

Letter map: Reis vs ruir

Shared letters muted; letters that set Reis and ruir apart highlighted. Shared run: 2.

4 ch

Reis

4 ch

ruir

Grammar separator: Reis vs ruir

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: Reis is anoun and ruiraverb. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 37540, derived from the frequency rank of both members and their visual similarity.

Reis is recorded at frequency rank #3,514, classified as anoun. ruir is at rank #34,026, tagged as averb, pronounced /ˈRwiɾ/.

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 37540, this pair ranks #29,057 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of Reis vs ruir

Shared letters: ir. Private to "Reis": es. Private to "ruir": u.

"Reis" · 4 letters · shape CVVC · "ruir" · 4 letters · shape CVVC

Known mistypes of this pair

Reis ← eris · reiss · resi · ries · rreis
ruir ← riur · rruir · ruirr · ruri · urir

Frequently Asked Questions

Can "Reis" and "ruir" be used interchangeably?

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

Frequency check: "Reis" vs "ruir" - which ranks higher?

"Reis" is the more common of the two: it sits at frequency rank #3,514 in our Portuguese list, against #34,026 for "ruir". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "Reis" and "ruir".

Full dictionary entry for "Reis" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "ruir" - compare definitions side by side with the headword page. Word entry
This pair ranks #29,057 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"Reis" and "ruir" also get mixed up with nearby pairs, the highest-scored neighbour is "ruir vs rust". 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 #29,057 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.