Which to use
“casto” is an adjective and “custom” is a noun - they look or sound alike but fill different roles in a sentence.
- #44,616
- “casto” frequency rank
- #35,445
- “custom” frequency rank
- 80061
- confusion score
Side-by-Side Comparison
| Feature | casto | custom |
|---|---|---|
| Definition | Persona que se abstiene de todo goce sexual o lo vive de acuerdo a ciertas directrices dictadas por su religión o su moral. | Costumbre. |
Where the eye mixes casto and custom
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Visual trap between casto and custom
These two trip readers on the page rather than in the ear: casto is [ˈkast̪o] while custom is /ˈkʌs.təm/. 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 80061, derived from the frequency rank of both members and their visual similarity.
casto is recorded at frequency rank #44,616, classified as anadj, pronounced [ˈkast̪o]. custom is at rank #35,445, tagged as anoun, pronounced /ˈkʌs.təm/.
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 80061, this pair ranks #12,163 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of casto vs custom
Shared letters: cost. Private to "casto": a. Private to "custom": mu.
"casto" · 5 letters · shape CVCCV · "custom" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Do "casto" and "custom" mean the same thing in a sentence?
In ordinary Spanish text, does "casto" or "custom" show up more?
Useful next steps
Eye-level mix-up between "casto" and "custom" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "casto" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "custom" - compare definitions side by side with the headword page. Word entry
- This pair ranks #12,163 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "casto" and "custom" also get mixed up with nearby pairs, the highest-scored neighbour is "casto vs Chasco". 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 #12,163 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.