complementanvscomplementoTell them apart

Quick tell: complementan is a verb, complemento is a noun, so they fill different roles in a sentence.

Which to use

“complementan” is a verb and “complemento” is a noun - they look or sound alike but fill different roles in a sentence.

#24,790
“complementan” frequency rank
#8,630
“complemento” frequency rank
33420
confusion score

Side-by-Side Comparison

Feature complementan complemento
Definition Tercera persona del plural (ellos, ellas; ustedes, 2.ª persona) del presente de indicativo de complementar o de complementarse. Elemento que se añade para completar o perfeccionar una cosa.

Where the eye mixes complementan and complemento

Muted = shared; highlighted = the visual trap. They share 10 letters in sequence.

12 ch
complementan
11 ch
complemento

Why the eye confuses complementan with complemento

These two trip readers on the page rather than in the ear: complementan is [kõmpleˈmẽn̪t̪ãn] while complemento is [kõmpleˈmẽn̪t̪o]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 33420, derived from the frequency rank of both members and their visual similarity.

complementan is recorded at frequency rank #24,790, classified as averb, pronounced [kõmpleˈmẽn̪t̪ãn]. complemento is at rank #8,630, tagged as anoun, pronounced [kõmpleˈmẽn̪t̪o].

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 33420, this pair ranks #196,921 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of complementan vs complemento

Shared letters: celmnopt. Private to "complementan": a. Private to "complemento": -.

"complementan" · 12 letters · shape CVCCCVCVCCVC  ·  "complemento" · 11 letters · shape CVCCCVCVCCV

Known mistypes of this pair

  • complementanccomplementan · cmoplementan · comlpementan · commplementan · compelmentan · compleemntan · complemenatn · complemenntan
  • complementoccomplemento · cmoplemento · comlpemento · commplemento · compelmento · compleemnto · complemennto · complemenot

Frequently Asked Questions

Is swapping "complementan" for "complemento" ever safe?
No - they are not even the same part of speech. "complementan" is a verb and "complemento" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "complementan" or "complemento" show up more?
"complemento" is the more common of the two: it sits at frequency rank #8,630 in our Spanish list, against #24,790 for "complementan". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "complementan" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "complemento" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #196,921 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "complementan" and "complemento" also get mixed up with nearby pairs, the highest-scored neighbour is "complementado vs complementan". 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 #196,921 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