Which to use
“fifties” and “forties” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #22,085
- “fifties” frequency rank
- #27,467
- “forties” frequency rank
- 49552
- confusion score
Side-by-Side Comparison
| Feature | fifties | forties |
|---|---|---|
| Definition | plural of fifty | The fifth decade of a century: the 1840s, 1940s, 2040s, etc. |
Letter map: fifties vs forties
Shared letters muted; letters that set fifties and forties apart highlighted. Shared run: 5. fifties and forties follow the identical consonant-vowel pattern (CVCCVVC). Same shape at a glance is often the real trap, independent of shared letters.
Pair insight - fifties / forties
fifties and forties are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 49552, derived from the frequency rank of both members and their visual similarity.
fifties is recorded at frequency rank #22,085, classified as anoun, pronounced /ˈfɪftiz/. forties is at rank #27,467, tagged as anoun.
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 49552, this pair ranks #182,520 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fifties vs forties
Shared letters: efist. Private to "fifties": -. Private to "forties": or.
"fifties" · 7 letters · shape CVCCVVC · "forties" · 7 letters · shape CVCCVVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "fifties" for "forties" ever safe?
In ordinary English text, does "fifties" or "forties" show up more?
Useful next steps
Pair "fifties" vs "forties" is on the table, pick a follow-up below.
- Full dictionary entry for "fifties" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "forties" - compare definitions side by side with the headword page. Word entry
- This pair ranks #182,520 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "fifties" and "forties" 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 #182,520 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.