Which to use
“FOIL” is a name and “frail” is an adjective - they look or sound alike but fill different roles in a sentence.
- #10,212
- “FOIL” frequency rank
- #20,119
- “frail” frequency rank
- 30331
- confusion score
Side-by-Side Comparison
| Feature | FOIL | frail |
|---|---|---|
| Definition | An acronym for the algorithm for multiplying two binomials. | Easily broken physically; not firm or durable; liable to fail and perish. |
Letter map: FOIL vs frail
Shared letters muted; letters that set FOIL and frail apart highlighted. Shared run: 3.
Part-of-speech tell for FOIL / frail
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: FOIL is aname and frailanadjective. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 30331, derived from the frequency rank of both members and their visual similarity.
FOIL is recorded at frequency rank #10,212, classified as aname. frail is at rank #20,119, tagged as anadj, pronounced /fɹeɪl/.
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 30331, this pair ranks #355,451 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of FOIL vs frail
Shared letters: fil. Private to "FOIL": o. Private to "frail": ar.
"FOIL" · 4 letters · shape CVVC · "frail" · 5 letters · shape CCVVC
Known mistypes of this pair
Frequently Asked Questions
Do "FOIL" and "frail" mean the same thing in a sentence?
Frequency check: "FOIL" vs "frail" - which ranks higher?
After this comparison
Done with this confusable. These links stay specific to "FOIL" and "frail".
- Full dictionary entry for "FOIL" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "frail" - compare definitions side by side with the headword page. Word entry
- This pair ranks #355,451 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "FOIL" and "frail" also get mixed up with nearby pairs, the highest-scored neighbour is "flail vs frail". 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 #355,451 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.