Which to use
“fifteen” is a num and “fifties” is a noun - they look or sound alike but fill different roles in a sentence.
- #5,681
- “fifteen” frequency rank
- #22,085
- “fifties” frequency rank
- 27766
- confusion score
Side-by-Side Comparison
| Feature | fifteen | fifties |
|---|---|---|
| Definition | The cardinal number occurring after fourteen (14) and before sixteen (16). | plural of fifty |
Where the eye mixes fifteen and fifties
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. fifteen and fifties follow the identical consonant-vowel pattern (CVCCVVC). Same shape at a glance is often the real trap, independent of shared letters.
Look-alike desk: fifteen vs fifties
These two trip readers on the page rather than in the ear: fifteen is /ˈfɪf.tiːn/ while fifties is /ˈfɪftiz/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (num vs noun), which is usually the fastest check. Our composite confusion score for this pair is 27766, derived from the frequency rank of both members and their visual similarity.
fifteen is recorded at frequency rank #5,681, classified as anum, pronounced /ˈfɪf.tiːn/. fifties is at rank #22,085, tagged as anoun, pronounced /ˈfɪftiz/.
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 27766, this pair ranks #376,274 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fifteen vs fifties
Shared letters: efit. Private to "fifteen": n. Private to "fifties": s.
"fifteen" · 7 letters · shape CVCCVVC · "fifties" · 7 letters · shape CVCCVVC
Known mistypes of this pair
Frequently Asked Questions
Can "fifteen" and "fifties" be used interchangeably?
In ordinary English text, does "fifteen" or "fifties" show up more?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "fifteen" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fifties" - compare definitions side by side with the headword page. Word entry
- This pair ranks #376,274 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "fifteen" and "fifties" also get mixed up with nearby pairs, the highest-scored neighbour is "fifties vs fiftieth". 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 #376,274 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.