nocivasvsnocivosTell them apart

Which to use

“nocivas” and “nocivos” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#36,180
“nocivas” frequency rank
#27,324
“nocivos” frequency rank
63504
confusion score

Side-by-Side Comparison

Feature nocivas nocivos
Definition Forma del femenino plural de nocivo. Forma del plural de nocivo.

Where the eye mixes nocivas and nocivos

Muted = shared; highlighted = the visual trap. They share 6 letters in sequence. nocivas and nocivos follow the identical consonant-vowel pattern (CVCVCVC). Same shape at a glance is often the real trap, independent of shared letters.

7 ch
nocivas
7 ch
nocivos

Look-alike desk: nocivas vs nocivos

A purely visual mix-up. nocivas ([noˈsiβ̞as]) and nocivos ([noˈsiβ̞os]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by a single letter - a in “nocivas” becomes o in “nocivos”. Our composite confusion score for this pair is 63504, derived from the frequency rank of both members and their visual similarity.

nocivas is recorded at frequency rank #36,180, classified as anadj, pronounced [noˈsiβ̞as]. nocivos is at rank #27,324, tagged as anadj, pronounced [noˈsiβ̞os].

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 63504, this pair ranks #48,532 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of nocivas vs nocivos

Shared letters: cinosv. Private to "nocivas": a. Private to "nocivos": -.

"nocivas" · 7 letters · shape CVCVCVC  ·  "nocivos" · 7 letters · shape CVCVCVC

Known mistypes of this pair

  • nocivas ← ncoivas · nnocivas · noccivas · nociavs · nocibas · nocivass · nocivsa · nocivvas
  • nocivos ← ncoivos · nnocivos · noccivos · nocibos · nociovs · nocivoss · nocivso · nocivvos

Frequently Asked Questions

Can "nocivas" and "nocivos" be used interchangeably?
No. They are said differently ([noˈsiβ̞as] versus [noˈsiβ̞os]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "nocivas" or "nocivos"?
"nocivos" is the more common of the two: it sits at frequency rank #27,324 in our Spanish list, against #36,180 for "nocivas". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "nocivas" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "nocivos" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #48,532 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "nocivas" and "nocivos" also get mixed up with nearby pairs, the highest-scored neighbour is "nociva vs nocivas". 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 #48,532 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