Which to use
“forty” is a num and “frosty” is an adjective - they look or sound alike but fill different roles in a sentence.
- #5,130
- “forty” frequency rank
- #22,384
- “frosty” frequency rank
- 27514
- confusion score
Side-by-Side Comparison
| Feature | forty | frosty |
|---|---|---|
| Definition | The cardinal number occurring after thirty-nine and before forty-one, represented in Roman numerals as XL and in Arabic numerals as 40. | Cold, chilly; icy. |
Where the eye mixes forty and frosty
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. forty runs 5 letters (CVCCV) against frosty's 6 (CCVCCV) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: forty vs frosty
These two trip readers on the page rather than in the ear: forty is /ˈfɔːti/ while frosty is /ˈfɹɒsti/. 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 (num vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 27514, derived from the frequency rank of both members and their visual similarity.
forty is recorded at frequency rank #5,130, classified as anum, pronounced /ˈfɔːti/. frosty is at rank #22,384, tagged as anadj, pronounced /ˈfɹɒsti/.
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 27514, this pair ranks #378,327 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of forty vs frosty
Shared letters: forty. Private to "forty": -. Private to "frosty": s.
"forty" · 5 letters · shape CVCCV · "frosty" · 6 letters · shape CCVCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "forty" for "frosty" ever safe?
In ordinary English text, does "forty" or "frosty" show up more?
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 "forty" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "frosty" - compare definitions side by side with the headword page. Word entry
- This pair ranks #378,327 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "forty" and "frosty" also get mixed up with nearby pairs, the highest-scored neighbour is "frosty vs frothy". 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 #378,327 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.