Which to use
“fastening” and “fasting” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #37,456
- “fastening” frequency rank
- #13,514
- “fasting” frequency rank
- 50970
- confusion score
Side-by-Side Comparison
| Feature | fastening | fasting |
|---|---|---|
| Definition | present participle and gerund of fasten | present participle and gerund of fast |
Where the eye mixes fastening and fasting
Muted = shared; highlighted = the visual trap. They share 7 letters in sequence.
Why the eye confuses fastening with fasting
A purely visual mix-up. fastening (/ˈfɑːsənɪŋ/) and fasting (/ˈfæstɪŋ/) 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 letter(s) in length. Our composite confusion score for this pair is 50970, derived from the frequency rank of both members and their visual similarity.
fastening is recorded at frequency rank #37,456, classified as averb, pronounced /ˈfɑːsənɪŋ/. fasting is at rank #13,514, tagged as averb, pronounced /ˈfæstɪŋ/.
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 50970, this pair ranks #169,519 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fastening vs fasting
Shared letters: afginst. Private to "fastening": e. Private to "fasting": -.
"fastening" · 9 letters · shape CVCCVCVCC · "fasting" · 7 letters · shape CVCCVCC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "fastening" for "fasting" ever safe?
Which is more common, "fastening" or "fasting"?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "fastening" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fasting" - compare definitions side by side with the headword page. Word entry
- This pair ranks #169,519 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "fastening" and "fasting" also get mixed up with nearby pairs, the highest-scored neighbour is "fastening vs festering". 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 #169,519 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.