Which to use
“Castilla” is a name and “castillo” is a noun - they look or sound alike but fill different roles in a sentence.
- #2,814
- “Castilla” frequency rank
- #2,237
- “castillo” frequency rank
- 5051
- confusion score
Side-by-Side Comparison
| Feature | Castilla | castillo |
|---|---|---|
| Definition | Región histórica de España. | Recinto fortificado, típico de la arquitectura militar del Medioevo, en especial el dotado de murallas y torres para su defensa |
Where the spellings diverge
Shared letters are muted; the letters that actually set Castilla and castillo apart are highlighted. They share 7 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: Castilla is [kasˈt̪iʝa] while castillo is [kasˈt̪iʝo]. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - a in “Castilla” becomes o in “castillo”, and the parts of speech differ too (name vs noun), which is usually the fastest check. Our composite confusion score for this pair is 5051, derived from the frequency rank of both members and their visual similarity.
Castilla is recorded at frequency rank #2,814, classified as aname, pronounced [kasˈt̪iʝa]. castillo is at rank #2,237, tagged as anoun, pronounced [kasˈt̪iʝo].
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 5051, this pair ranks #314,616 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of Castilla vs castillo
Shared letters: acilst. Private to "Castilla": -. Private to "castillo": o.
"Castilla" · 8 letters · shape CVCCVCCV · "castillo" · 8 letters · shape CVCCVCCV
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "Castilla" and "castillo" be used interchangeably?
Which is more common, "Castilla" or "castillo"?
Remembering Castilla vs castillo
The fastest way to pick the right one every time.
- Check the role first: if you need a name, it's “Castilla”; for a noun, it's “castillo”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “Castilla” entry
- Browse more pairs most likely to be confused. Most confusable