viagravsvíboraWhich spelling fits?

Which to use

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

#29,884
“viagra” frequency rank
#24,698
“víbora” frequency rank
54582
confusion score

Side-by-Side Comparison

Feature viagra víbora
Definition Pastilla utilizada para tratar la impotencia sexual en los hombres. En sentido estricto, serpientes pertenecientes a la subfamilia Viperinae, que junto con los crótalos(Crotalinae) forman la familia de los Vipéridos (Viperidae). La mayoría de las especies son muy venenosas y poseen dos colmillos huecos con los que inyectan el veneno en la mordedura. Son muy peligrosas para el hombre.

Where the eye mixes viagra and víbora

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. viagra (CVVCCV) and víbora (CVCVCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

6 ch
viagra
6 ch
víbora

Why the eye confuses viagra with víbora

A purely visual mix-up. viagra ([ˈbjaɣ̞ɾa]) and víbora ([ˈbiβ̞oɾa]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 3 positions. Our composite confusion score for this pair is 54582, derived from the frequency rank of both members and their visual similarity.

viagra is recorded at frequency rank #29,884, classified as anoun, pronounced [ˈbjaɣ̞ɾa]. víbora is at rank #24,698, tagged as anoun, pronounced [ˈbiβ̞oɾa].

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 54582, this pair ranks #82,668 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of viagra vs víbora

Shared letters: arv. Private to "viagra": gi. Private to "víbora": boí.

"viagra" · 6 letters · shape CVVCCV  ·  "víbora" · 6 letters · shape CVCVCV

Known mistypes of this pair

  • viagra ← biagra · ivagra · vaigra · viagar · viaggra · viagrra · viarga · vigara

Frequently Asked Questions

Is swapping "viagra" for "víbora" ever safe?
No. They are said differently ([ˈbjaɣ̞ɾa] versus [ˈbiβ̞oɾa]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary Spanish text, does "viagra" or "víbora" show up more?
"víbora" is the more common of the two: it sits at frequency rank #24,698 in our Spanish list, against #29,884 for "viagra". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Eye-level mix-up between "viagra" and "víbora" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "viagra" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "víbora" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #82,668 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "viagra" and "víbora" also get mixed up with nearby pairs, the highest-scored neighbour is "viagra vs Vira". 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 #82,668 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