ondasvsotrasWhich spelling fits?

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

Which to use

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

#7,891
“ondas” frequency rank
#176
“otras” frequency rank
8067
confusion score

Side-by-Side Comparison

Feature ondas otras
Definition Forma del plural de onda. Forma del femenino plural de otro.

Where the eye mixes ondas and otras

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. ondas and otras follow the identical consonant-vowel pattern (VCCVC). Same shape at a glance is often the real trap, independent of shared letters.

5 ch
ondas
5 ch
otras

Visual trap between ondas and otras

These two trip readers on the page rather than in the ear: ondas is [ˈõn̪d̪as] while otras is [ˈot̪ɾas]. 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 8067, derived from the frequency rank of both members and their visual similarity.

ondas is recorded at frequency rank #7,891, classified as anoun, pronounced [ˈõn̪d̪as]. otras is at rank #176, tagged as anadj, pronounced [ˈot̪ɾas].

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 8067, this pair ranks #306,103 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ondas vs otras

Shared letters: aos. Private to "ondas": dn. Private to "otras": rt.

"ondas" · 5 letters · shape VCCVC  ·  "otras" · 5 letters · shape VCCVC

Known mistypes of this pair

  • ondas ← nodas · odnas · onads · ondass · onddas · ondsa · onndas
  • otras ← ortas · otars · otrass · otrras · otrsa · ottras · toras

Frequently Asked Questions

Is swapping "ondas" for "otras" ever safe?
No - they are not even the same part of speech. "ondas" is a noun and "otras" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "ondas" or "otras" show up more?
"otras" is the more common of the two: it sits at frequency rank #176 in our Spanish list, against #7,891 for "ondas". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

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 "ondas" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "otras" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #306,103 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "ondas" and "otras" also get mixed up with nearby pairs, the highest-scored neighbour is "ondas vs óseas". 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 #306,103 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