añovsaoWhat's the difference?

Quick tell: año is a noun, ao is a contraction, so they fill different roles in a sentence.

Which to use

“año” is a noun and “ao” is a contraction - they look or sound alike but fill different roles in a sentence.

#100
“año” frequency rank
#21,556
“ao” frequency rank
21656
confusion score

Side-by-Side Comparison

Feature año ao
Definition Intervalo de tiempo que tarda la Tierra en hacer una revolución alrededor del Sol. El año se compone de 365 días y cuarto aproximadamente. Por eso cada cuatro años el año civil tiene un día más. Contracción de la preposición a ("a") y el artículo o ("el"): (al).

Where the eye mixes año and ao

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch
año
2 ch
ao

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: año is [ˈaɲo] while ao is [ɔ]. 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 contraction), which is usually the fastest check. Our composite confusion score for this pair is 21656, derived from the frequency rank of both members and their visual similarity.

año is recorded at frequency rank #100, classified as anoun, pronounced [ˈaɲo]. ao is at rank #21,556, tagged as acontraction, pronounced [ɔ].

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 21656, this pair ranks #253,916 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of año vs ao

Shared letters: ao. Private to "año": ñ. Private to "ao": -.

"año" · 3 letters · shape VCV  ·  "ao" · 2 letters · shape VV

Frequently Asked Questions

Can "año" and "ao" be used interchangeably?
No - they are not even the same part of speech. "año" is a noun and "ao" a contraction, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "año" or "ao"?
"año" is the more common of the two: it sits at frequency rank #100 in our Spanish list, against #21,556 for "ao". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list