ruídovsrussoWhich spelling fits?

Quick tell: ruído is a noun, russo is an adjective, so they fill different roles in a sentence.

Which to use

“ruído” is a noun and “russo” is an adjective - they look or sound alike but fill different roles in a sentence.

#8,260
“ruído” frequency rank
#1,947
“russo” frequency rank
10207
confusion score

Side-by-Side Comparison

Feature ruído russo
Definition som de pouca intensidade, confuso relativo à Rússia, sua cultura e idioma

Letter map: ruído vs russo

Shared letters muted; letters that set ruído and russo apart highlighted. Shared run: 3. ruído (CVVCV) and russo (CVCCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

5 ch
ruído
5 ch
russo

Grammar separator: ruído vs russo

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ruído is anoun and russoanadjective. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 10207, derived from the frequency rank of both members and their visual similarity.

ruído is recorded at frequency rank #8,260, classified as anoun, pronounced /ʁuˈi.du/ [hʊˈi.du], AFI: /ˈʁwi.du/ [ˈhwi.du] (coloquial) (faster pronunciation). russo is at rank #1,947, tagged as anadj.

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 10207, this pair ranks #62,963 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ruído vs russo

Shared letters: oru. Private to "ruído": dí. Private to "russo": s.

"ruído" · 5 letters · shape CVVCV  ·  "russo" · 5 letters · shape CVCCV

Known mistypes of this pair

  • russo ← rrusso · rsuso · ruso · rusos · ursso

Frequently Asked Questions

Can "ruído" and "russo" be used interchangeably?
No - they are not even the same part of speech. "ruído" is a noun and "russo" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "ruído" or "russo" show up more?
"russo" is the more common of the two: it sits at frequency rank #1,947 in our Portuguese list, against #8,260 for "ruído". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Done with this confusable. These links stay specific to "ruído" and "russo".

  • Full dictionary entry for "ruído" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "russo" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #62,963 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "ruído" and "russo" also get mixed up with nearby pairs, the highest-scored neighbour is "rossio vs russo". 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 #62,963 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list