retovsrusoWhich spelling fits?

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

Which to use

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

#3,589
“reto” frequency rank
#2,474
“ruso” frequency rank
6063
confusion score

Side-by-Side Comparison

Feature reto ruso
Definition Acción o efecto de retar. Persona que es originaria de Rusia.

Where the eye mixes reto and ruso

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
reto
4 ch
ruso

Visual trap between reto and ruso

These two trip readers on the page rather than in the ear: reto is [ˈret̪o] while ruso is [ˈruso]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 6063, derived from the frequency rank of both members and their visual similarity.

reto is recorded at frequency rank #3,589, classified as anoun, pronounced [ˈret̪o]. ruso is at rank #2,474, tagged as anadj, pronounced [ˈruso].

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 6063, this pair ranks #311,880 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of reto vs ruso

Shared letters: or. Private to "reto": et. Private to "ruso": su.

"reto" · 4 letters · shape CVCV  ·  "ruso" · 4 letters · shape CVCV

Known mistypes of this pair

  • retoerto · reot · retto · rreto · rteo
  • rusorruso · rsuo · ruos · russo · urso

Frequently Asked Questions

Can "reto" and "ruso" be used interchangeably?
No - they are not even the same part of speech. "reto" is a noun and "ruso" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "reto" or "ruso"?
"ruso" is the more common of the two: it sits at frequency rank #2,474 in our Spanish list, against #3,589 for "reto". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "reto" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ruso" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #311,880 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "reto" and "ruso" also get mixed up with nearby pairs, the highest-scored neighbour is "rengo vs reto". 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 #311,880 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list