cierrovsciertaTell them apart

Quick tell: cierro is a verb, cierta is an adjective, so they fill different roles in a sentence.

Which to use

“cierro” is a verb and “cierta” is an adjective - they look or sound alike but fill different roles in a sentence.

#17,070
“cierro” frequency rank
#1,668
“cierta” frequency rank
18738
confusion score

Side-by-Side Comparison

Feature cierro cierta
Definition Primera persona del singular (yo) del presente de indicativo de cerrar o de cerrarse. Forma del femenino de cierto.

Where the eye mixes cierro and cierta

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

6 ch
cierro
6 ch
cierta

Look-alike desk: cierro vs cierta

These two trip readers on the page rather than in the ear: cierro is [ˈsjero] while cierta is [ˈsjeɾt̪a]. 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 (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 18738, derived from the frequency rank of both members and their visual similarity.

cierro is recorded at frequency rank #17,070, classified as averb, pronounced [ˈsjero]. cierta is at rank #1,668, tagged as anadj, pronounced [ˈsjeɾt̪a].

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 18738, this pair ranks #266,670 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of cierro vs cierta

Shared letters: ceir. Private to "cierro": o. Private to "cierta": at.

"cierro" · 6 letters · shape CVVCCV  ·  "cierta" · 6 letters · shape CVVCCV

Known mistypes of this pair

  • cierroccierro · ceirro · ciero · cieror · cirero · icerro · sierro
  • ciertaccierta · ceirta · cierat · cierrta · ciertta · cietra · cireta · icerta

Frequently Asked Questions

Can "cierro" and "cierta" be used interchangeably?
No - they are not even the same part of speech. "cierro" is a verb and "cierta" an adjective, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "cierro" vs "cierta" - which ranks higher?
"cierta" is the more common of the two: it sits at frequency rank #1,668 in our Spanish list, against #17,070 for "cierro". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

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

  • Full dictionary entry for "cierro" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "cierta" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #266,670 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "cierro" and "cierta" also get mixed up with nearby pairs, the highest-scored neighbour is "cierro vs cierva". 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 #266,670 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