Which to use
“infect” is a verb and “insect” is a noun - they look or sound alike but fill different roles in a sentence.
- #18,109
- “infect” frequency rank
- #10,227
- “insect” frequency rank
- 28336
- confusion score
Side-by-Side Comparison
| Feature | infect | insect |
|---|---|---|
| Definition | 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. | An arthropod (in the Insecta class) characterized by six legs, up to four wings, and a chitinous exoskeleton. |
Where the spellings diverge
Shared letters are muted; the letters that actually set infect and insect apart are highlighted. They share 5 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: infect is /ɪnˈfɛkt/ while insect is /ˈɪn.sɛkt/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - f in “infect” becomes s in “insect”, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 28336, derived from the frequency rank of both members and their visual similarity.
infect is recorded at frequency rank #18,109, classified as averb, pronounced /ɪnˈfɛkt/. insect is at rank #10,227, tagged as anoun, pronounced /ˈɪn.sɛkt/.
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 28336, this pair ranks #371,885 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of infect vs insect
Shared letters: ceint. Private to "infect": f. Private to "insect": s.
"infect" · 6 letters · shape VCCVCC · "insect" · 6 letters · shape VCCVCC
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "infect" and "insect" be used interchangeably?
Which is more common, "infect" or "insect"?
Remembering infect vs insect
The fastest way to pick the right one every time.
- Check the role first: if you need a verb, it's “infect”; for a noun, it's “insect”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “infect” entry
- Browse more pairs most likely to be confused. Most confusable