nocivavsnocivoWhich spelling fits?

Which to use

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

#40,976
“nociva” frequency rank
#29,315
“nocivo” frequency rank
70291
confusion score

Side-by-Side Comparison

Feature nociva nocivo
Definition Forma del femenino de nocivo. Que hace daño o perjudica.

Where the eye mixes nociva and nocivo

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. nociva and nocivo follow the identical consonant-vowel pattern (CVCVCV). Same shape at a glance is often the real trap, independent of shared letters.

6 ch
nociva
6 ch
nocivo

Look-alike desk: nociva vs nocivo

A purely visual mix-up. nociva ([noˈsiβ̞a]) and nocivo ([noˈsiβ̞o]) 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 “nociva” becomes o in “nocivo”. Our composite confusion score for this pair is 70291, derived from the frequency rank of both members and their visual similarity.

nociva is recorded at frequency rank #40,976, classified as anadj, pronounced [noˈsiβ̞a]. nocivo is at rank #29,315, tagged as anadj, pronounced [noˈsiβ̞o].

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 70291, this pair ranks #30,046 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of nociva vs nocivo

Shared letters: cinov. Private to "nociva": a. Private to "nocivo": -.

"nociva" · 6 letters · shape CVCVCV  ·  "nocivo" · 6 letters · shape CVCVCV

Known mistypes of this pair

  • nociva ← ncoiva · nnociva · nocciva · nociav · nociba · nocivva · nocvia · noicva
  • nocivo ← ncoivo · nnocivo · noccivo · nocibo · nociov · nocivvo · nocvio · noicvo

Frequently Asked Questions

Can "nociva" and "nocivo" be used interchangeably?
No. They are said differently ([noˈsiβ̞a] versus [noˈsiβ̞o]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Frequency check: "nociva" vs "nocivo" - which ranks higher?
"nocivo" is the more common of the two: it sits at frequency rank #29,315 in our Spanish list, against #40,976 for "nociva". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "nociva" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "nocivo" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #30,046 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "nociva" and "nocivo" also get mixed up with nearby pairs, the highest-scored neighbour is "necia vs nociva". 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 #30,046 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