Which to use
“infidel” is an adjective and “infill” is a verb - they look or sound alike but fill different roles in a sentence.
- #38,438
- “infidel” frequency rank
- #48,290
- “infill” frequency rank
- 86728
- confusion score
Side-by-Side Comparison
| Feature | infidel | infill |
|---|---|---|
| Definition | Rejecting a specific religion. | To fill in a space, hole or gap. |
Letter map: infidel vs infill
Shared letters muted; letters that set infidel and infill apart highlighted. Shared run: 5. infidel runs 7 letters (VCCVCVC) against infill's 6 (VCCVCC) - the length gap alone is often enough to separate them once you know to check it.
Part-of-speech tell for infidel / infill
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: infidel is anadjective and infillaverb. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 86728, derived from the frequency rank of both members and their visual similarity.
infidel is recorded at frequency rank #38,438, classified as anadj, pronounced /ˈɪn.fə.dl̩/. infill is at rank #48,290, tagged as averb.
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 86728, this pair ranks #8,577 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of infidel vs infill
Shared letters: filn. Private to "infidel": de. Private to "infill": -.
"infidel" · 7 letters · shape VCCVCVC · "infill" · 6 letters · shape VCCVCC
Known mistypes of this pair
Frequently Asked Questions
Can "infidel" and "infill" be used interchangeably?
Which is more common, "infidel" or "infill"?
What to do next
You've compared "infidel" and "infill". Here's where to go from here.
- Full dictionary entry for "infidel" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "infill" - compare definitions side by side with the headword page. Word entry
- This pair ranks #8,577 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "infidel" and "infill" also get mixed up with nearby pairs, the highest-scored neighbour is "infill vs infirm". 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 #8,577 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.