contagiovscontagiosaWhich spelling fits?

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

Which to use

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

#16,060
“contagio” frequency rank
#25,193
“contagiosa” frequency rank
41253
confusion score

Side-by-Side Comparison

Feature contagio contagiosa
Definition Acción o efecto de contagiar (transmitir un agente patógeno). Forma del femenino de contagioso.

Where the eye mixes contagio and contagiosa

Muted = shared; highlighted = the visual trap. They share 8 letters in sequence. contagio runs 8 letters (CVCCVCVV) against contagiosa's 10 (CVCCVCVVCV) - the length gap alone is often enough to separate them once you know to check it.

8 ch
contagio
10 ch
contagiosa

Why the eye confuses contagio with contagiosa

These two trip readers on the page rather than in the ear: contagio is [kõn̪ˈt̪axjo] while contagiosa is [kõn̪t̪aˈxjosa]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “contagio” sits inside “contagiosa”, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 41253, derived from the frequency rank of both members and their visual similarity.

contagio is recorded at frequency rank #16,060, classified as anoun, pronounced [kõn̪ˈt̪axjo]. contagiosa is at rank #25,193, tagged as anadj, pronounced [kõn̪t̪aˈxjosa].

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 41253, this pair ranks #154,663 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of contagio vs contagiosa

Shared letters: acginot. Private to "contagio": -. Private to "contagiosa": s.

"contagio" · 8 letters · shape CVCCVCVV  ·  "contagiosa" · 10 letters · shape CVCCVCVVCV

Known mistypes of this pair

  • contagio ← ccontagio · cnotagio · conatgio · conntagio · contaggio · contagoi · contaigo · contgaio
  • contagiosa ← ccontagiosa · cnotagiosa · conatgiosa · conntagiosa · contaggiosa · contagioas · contagiossa · contagisoa

Frequently Asked Questions

Is swapping "contagio" for "contagiosa" ever safe?
No - they are not even the same part of speech. "contagio" is a noun and "contagiosa" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "contagio" or "contagiosa" show up more?
"contagio" is the more common of the two: it sits at frequency rank #16,060 in our Spanish list, against #25,193 for "contagiosa". 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 "contagio" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "contagiosa" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #154,663 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "contagio" and "contagiosa" also get mixed up with nearby pairs, the highest-scored neighbour is "contagiosa vs contagioso". 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 #154,663 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