tercavstuercasWhich spelling fits?

Quick tell: terca is a adjective, tuercas is a noun, so they fill different roles in a sentence.

Which to use

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

#42,175
“terca” frequency rank
#34,820
“tuercas” frequency rank
76995
confusion score

Side-by-Side Comparison

Feature terca tuercas
Definition Forma del femenino singular de terco. Forma del plural de tuerca.

Where the eye mixes terca and tuercas

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.

5 ch
terca
7 ch
tuercas

Look-alike desk: terca vs tuercas

These two trip readers on the page rather than in the ear: terca is [ˈt̪eɾka] while tuercas is [ˈt̪weɾkas]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 76995, derived from the frequency rank of both members and their visual similarity.

terca is recorded at frequency rank #42,175, classified as anadj, pronounced [ˈt̪eɾka]. tuercas is at rank #34,820, tagged as anoun, pronounced [ˈt̪weɾkas].

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 76995, this pair ranks #16,776 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of terca vs tuercas

Shared letters: acert. Private to "terca": -. Private to "tuercas": su.

"terca" · 5 letters · shape CVCCV  ·  "tuercas" · 7 letters · shape CVVCCVC

Known mistypes of this pair

  • tercaetrca · tecra · terac · tercca · terrca · treca · tterca
  • tuercasteurcas · ttuercas · tuecras · tueracs · tuercass · tuerccas · tuercsa · tuerrcas

Frequently Asked Questions

Can "terca" and "tuercas" be used interchangeably?
No - they are not even the same part of speech. "terca" is an adjective and "tuercas" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "terca" or "tuercas" show up more?
"tuercas" is the more common of the two: it sits at frequency rank #34,820 in our Spanish list, against #42,175 for "terca". 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 "terca" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "tuercas" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #16,776 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "terca" and "tuercas" also get mixed up with nearby pairs, the highest-scored neighbour is "terca vs tercos". 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 #16,776 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