Which to use
“inform” is a verb and “informal” is an adjective - they look or sound alike but fill different roles in a sentence.
- #5,603
- “inform” frequency rank
- #8,682
- “informal” frequency rank
- 14285
- confusion score
Side-by-Side Comparison
| Feature | inform | informal |
|---|---|---|
| Definition | To instruct, train (usually in matters of knowledge). | Not formal or ceremonious. |
Where the spellings diverge
Shared letters are muted; the letters that actually set inform and informal apart are highlighted. They share 6 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: inform is /ɪnˈfɔɹm/ while informal is /ɪnˈfɔɹm(ə)l/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “inform” sits inside “informal”, and the parts of speech differ too (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 14285, derived from the frequency rank of both members and their visual similarity.
inform is recorded at frequency rank #5,603, classified as averb, pronounced /ɪnˈfɔɹm/. informal is at rank #8,682, tagged as anadj, pronounced /ɪnˈfɔɹm(ə)l/.
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 14285, this pair ranks #470,959 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of inform vs informal
Shared letters: fimnor. Private to "inform": -. Private to "informal": al.
"inform" · 6 letters · shape VCCVCC · "informal" · 8 letters · shape VCCVCCVC
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "inform" and "informal" be used interchangeably?
Which is more common, "inform" or "informal"?
Remembering inform vs informal
The fastest way to pick the right one every time.
- Check the role first: if you need a verb, it's “inform”; for an adjective, it's “informal”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “inform” entry
- Browse more pairs most likely to be confused. Most confusable