décadavsdecidasWhich spelling fits?

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

Which to use

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

#2,078
“década” frequency rank
#21,965
“decidas” frequency rank
24043
confusion score

Side-by-Side Comparison

Feature década decidas
Definition Período de diez años. Segunda persona del singular (tú) del presente de subjuntivo de decidir o de decidirse.

Where the eye mixes década and decidas

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

6 ch
década
7 ch
decidas

Look-alike desk: década vs decidas

These two trip readers on the page rather than in the ear: década is [ˈd̪ekað̞a] while decidas is [d̪eˈsið̞as]. 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 (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 24043, derived from the frequency rank of both members and their visual similarity.

década is recorded at frequency rank #2,078, classified as anoun, pronounced [ˈd̪ekað̞a]. decidas is at rank #21,965, tagged as averb, pronounced [d̪eˈsið̞as].

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 24043, this pair ranks #242,963 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of década vs decidas

Shared letters: acd. Private to "década": é. Private to "decidas": eis.

"década" · 6 letters · shape CVCVCV  ·  "decidas" · 7 letters · shape CVCVCVC

Known mistypes of this pair

  • decidasdceidas · ddecidas · deccidas · decdias · deciads · decidass · deciddas · decidsa

Frequently Asked Questions

Do "década" and "decidas" mean the same thing in a sentence?
No - they are not even the same part of speech. "década" is a noun and "decidas" a verb, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "década" vs "decidas" - which ranks higher?
"década" is the more common of the two: it sits at frequency rank #2,078 in our Spanish list, against #21,965 for "decidas". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

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

  • Full dictionary entry for "década" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "decidas" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #242,963 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "década" and "decidas" also get mixed up with nearby pairs, the highest-scored neighbour is "decidas vs decididas". 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 #242,963 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