infidel vs infill, What's the Difference?

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.

Where the spellings diverge

Shared letters are muted; the letters that actually set infidel and infill apart are highlighted. They share 5 letters in sequence, which is exactly why the eye skips the difference.

7 ch

infidel

6 ch

infill

Spelling & Dictionary Insight

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

infidel ← ifnidel · infdiel · inffidel · infiddel · infidell · infidle · inifdel · innfidel
infill ← ifnill · inffill · infil · inflil · inifll · innfill · nifill

Frequency comparison

infidel#38,438

infill#48,290

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "infidel" and "infill" be used interchangeably?

No - they are not even the same part of speech. "infidel" is an adjective and "infill" a verb, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "infidel" or "infill"?

"infidel" is the more common of the two: it sits at frequency rank #38,438 in our English list, against #48,290 for "infill". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering infidel vs infill

The fastest way to pick the right one every time.

Check the role first: if you need an adjective, it's “infidel”; for a verb, it's “infill”.
See each word in full, definition, IPA, etymology and its other confusables. Full “infidel” entry
Browse more pairs most likely to be confused. Most confusable