centenarvscentenarioWhich spelling fits?

Quick tell: centenar is a noun, centenario is an adjective, so they fill different roles in a sentence.

Which to use

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

#14,092
“centenar” frequency rank
#7,268
“centenario” frequency rank
21360
confusion score

Side-by-Side Comparison

Feature centenar centenario
Definition Grupo de cien unidades. Que tiene cien años, o poco mas o menos.

Where the eye mixes centenar and centenario

Muted = shared; highlighted = the visual trap. They share 8 letters in sequence. centenar runs 8 letters (CVCCVCVC) against centenario's 10 (CVCCVCVCVV) - the length gap alone is often enough to separate them once you know to check it.

8 ch
centenar
10 ch
centenario

Visual trap between centenar and centenario

These two trip readers on the page rather than in the ear: centenar is [sẽn̪t̪eˈnaɾ] while centenario is [sẽn̪t̪eˈnaɾjo]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “centenar” sits inside “centenario”, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 21360, derived from the frequency rank of both members and their visual similarity.

centenar is recorded at frequency rank #14,092, classified as anoun, pronounced [sẽn̪t̪eˈnaɾ]. centenario is at rank #7,268, tagged as anadj, pronounced [sẽn̪t̪eˈnaɾjo].

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 21360, this pair ranks #255,285 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of centenar vs centenario

Shared letters: acenrt. Private to "centenar": -. Private to "centenario": io.

"centenar" · 8 letters · shape CVCCVCVC  ·  "centenario" · 10 letters · shape CVCCVCVCVV

Known mistypes of this pair

  • centenar ← ccentenar · cenetnar · cenntenar · centeanr · centenarr · centennar · centenra · centnear
  • centenario ← ccentenario · cenetnario · cenntenario · centeanrio · centenairo · centenaroi · centenarrio · centennario

Frequently Asked Questions

Can "centenar" and "centenario" be used interchangeably?
No - they are not even the same part of speech. "centenar" is a noun and "centenario" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "centenar" or "centenario" show up more?
"centenario" is the more common of the two: it sits at frequency rank #7,268 in our Spanish list, against #14,092 for "centenar". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "centenar" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "centenario" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #255,285 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "centenar" and "centenario" also get mixed up with nearby pairs, the highest-scored neighbour is "centenar vs centenas". 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 #255,285 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