Which to use
“fasten” and “fastened” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #29,649
- “fasten” frequency rank
- #28,204
- “fastened” frequency rank
- 57853
- confusion score
Side-by-Side Comparison
| Feature | fasten | fastened |
|---|---|---|
| Definition | To attach or connect in a secure manner. | simple past and past participle of fasten |
Where the eye mixes fasten and fastened
Muted = shared; highlighted = the visual trap. They share 6 letters in sequence. fasten runs 6 letters (CVCCVC) against fastened's 8 (CVCCVCVC) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses fasten with fastened
A purely visual mix-up. fasten (/ˈfɑːsn̩/) and fastened (/ˈfɑːsn̩d/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 extra letter(s) - “fasten” sits inside “fastened”. Our composite confusion score for this pair is 57853, derived from the frequency rank of both members and their visual similarity.
fasten is recorded at frequency rank #29,649, classified as averb, pronounced /ˈfɑːsn̩/. fastened is at rank #28,204, tagged as averb, pronounced /ˈfɑːsn̩d/.
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 57853, this pair ranks #116,488 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of fasten vs fastened
Shared letters: aefnst. Private to "fasten": -. Private to "fastened": d.
"fasten" · 6 letters · shape CVCCVC · "fastened" · 8 letters · shape CVCCVCVC
Known mistypes of this pair
Frequently Asked Questions
Do "fasten" and "fastened" mean the same thing in a sentence?
Frequency check: "fasten" vs "fastened" - which ranks higher?
What to do next
Eye-level mix-up between "fasten" and "fastened" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "fasten" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fastened" - compare definitions side by side with the headword page. Word entry
- This pair ranks #116,488 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "fasten" and "fastened" also get mixed up with nearby pairs, the highest-scored neighbour is "fasten vs fastener". 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 #116,488 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.