Which to use
“bas” is an adjective and “based” is a verb - they look or sound alike but fill different roles in a sentence.
- #25,153
- “bas” frequency rank
- #35,898
- “based” frequency rank
- 61051
- confusion score
Side-by-Side Comparison
| Feature | bas | based |
|---|---|---|
| Definition | Bajo. | Pasado simple del verbo (to) base. |
Where the eye mixes bas and based
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Look-alike desk: bas vs based
These two trip readers on the page rather than in the ear: bas is /bɑ/ while based is /beɪst/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “bas” sits inside “based”, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 61051, derived from the frequency rank of both members and their visual similarity.
bas is recorded at frequency rank #25,153, classified as anadj, pronounced /bɑ/. based is at rank #35,898, tagged as averb, pronounced /beɪst/.
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 61051, this pair ranks #56,798 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of bas vs based
Shared letters: abs. Private to "bas": -. Private to "based": de.
"bas" · 3 letters · shape CVC · "based" · 5 letters · shape CVCVC
Known mistypes of this pair
- based ← absed · baced · baesd · basde · basedd · bassed · bbased · bsaed
Frequently Asked Questions
Is swapping "bas" for "based" ever safe?
Which is more common, "bas" or "based"?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "bas" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "based" - compare definitions side by side with the headword page. Word entry
- This pair ranks #56,798 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "bas" and "based" also get mixed up with nearby pairs, the highest-scored neighbour is "bane vs based". 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 #56,798 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.