Which to use
“incest” is a noun and “infect” is a verb - they look or sound alike but fill different roles in a sentence.
- #18,108
- “incest” frequency rank
- #18,109
- “infect” frequency rank
- 36217
- confusion score
Side-by-Side Comparison
| Feature | incest | infect |
|---|---|---|
| Definition | Sexual relations between close relatives, especially immediate family members and sometimes first cousins, usually considered taboo. | To bring (the body or part of it) into contact with a substance that causes illness (a pathogen), so that the pathogen begins to act on the body; (of a pathogen) to come into contact with (a body or body part) and begin to act on it. |
Where the eye mixes incest and infect
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. incest and infect follow the identical consonant-vowel pattern (VCCVCC). Same shape at a glance is often the real trap, independent of shared letters.
Visual trap between incest and infect
These two trip readers on the page rather than in the ear: incest is /ˈɪn.sɛst/ while infect is /ɪnˈfɛkt/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 36217, derived from the frequency rank of both members and their visual similarity.
incest is recorded at frequency rank #18,108, classified as anoun, pronounced /ˈɪn.sɛst/. infect is at rank #18,109, tagged as averb, pronounced /ɪnˈfɛkt/.
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 36217, this pair ranks #305,113 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of incest vs infect
Shared letters: ceint. Private to "incest": s. Private to "infect": f.
"incest" · 6 letters · shape VCCVCC · "infect" · 6 letters · shape VCCVCC
Known mistypes of this pair
Frequently Asked Questions
Do "incest" and "infect" mean the same thing in a sentence?
Frequency check: "incest" vs "infect" - which ranks higher?
Useful next steps
Eye-level mix-up between "incest" and "infect" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "incest" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "infect" - compare definitions side by side with the headword page. Word entry
- This pair ranks #305,113 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "incest" and "infect" also get mixed up with nearby pairs, the highest-scored neighbour is "ices vs incest". 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 #305,113 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.