conchavscontraWhat's the difference?

Quick tell: concha is a noun, contra is a preposition, so they fill different roles in a sentence.

Which to use

“concha” is a noun and “contra” is a preposition - they look or sound alike but fill different roles in a sentence.

#3,685
“concha” frequency rank
#129
“contra” frequency rank
3814
confusion score

Side-by-Side Comparison

Feature concha contra
Definition Pieza sólida y resistente que protege el cuerpo de diversas clases de animales. Se denomina con más precisión valva en los moluscos y caparazón en los crustáceos y quelónidos. Indica oposición.

Where the eye mixes concha and contra

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.

6 ch
concha
6 ch
contra

Visual trap between concha and contra

These two trip readers on the page rather than in the ear: concha is [ˈkõnʲt͡ʃa] while contra is [ˈkõn̪t̪ɾa]. 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 preposition), which is usually the fastest check. Our composite confusion score for this pair is 3814, derived from the frequency rank of both members and their visual similarity.

concha is recorded at frequency rank #3,685, classified as anoun, pronounced [ˈkõnʲt͡ʃa]. contra is at rank #129, tagged as aprep, pronounced [ˈkõn̪t̪ɾa].

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 3814, this pair ranks #317,496 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of concha vs contra

Shared letters: acno. Private to "concha": h. Private to "contra": rt.

"concha" · 6 letters · shape CVCCCV  ·  "contra" · 6 letters · shape CVCCCV

Known mistypes of this pair

  • conchacconcha · cnocha · cocnha · concah · conccha · conchha · conhca · conncha
  • contraccontra · cnotra · conntra · conrta · contrra · conttra · cotnra · ocntra

Frequently Asked Questions

Is swapping "concha" for "contra" ever safe?
No - they are not even the same part of speech. "concha" is a noun and "contra" a preposition, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "concha" or "contra"?
"contra" is the more common of the two: it sits at frequency rank #129 in our Spanish list, against #3,685 for "concha". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

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

  • Full dictionary entry for "concha" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "contra" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #317,496 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "concha" and "contra" also get mixed up with nearby pairs, the highest-scored neighbour is "concha vs conchuda". 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 #317,496 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