Which to use
“underage” is an adjective and “undergo” is a verb - they look or sound alike but fill different roles in a sentence.
- #15,727
- “underage” frequency rank
- #9,552
- “undergo” frequency rank
- 25279
- confusion score
Side-by-Side Comparison
| Feature | underage | undergo |
|---|---|---|
| Definition | Below the legal age (usually age 18) for some activity, such as consuming alcohol or engaging in sexual intercourse. | To experience; to pass through a phase. |
Where the spellings diverge
Shared letters are muted; the letters that actually set underage and undergo 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: underage is /ˌʌndəɹˈeɪd͡ʒ/ while undergo is /ˌʌndɚˈɡoʊ/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 25279, derived from the frequency rank of both members and their visual similarity.
underage is recorded at frequency rank #15,727, classified as anadj, pronounced /ˌʌndəɹˈeɪd͡ʒ/. undergo is at rank #9,552, tagged as averb, pronounced /ˌʌndɚˈɡoʊ/.
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 25279, this pair ranks #395,524 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of underage vs undergo
Shared letters: degnru. Private to "underage": a. Private to "undergo": o.
"underage" · 8 letters · shape VCCVCVCV · "undergo" · 7 letters · shape VCCVCCV
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "underage" and "undergo" be used interchangeably?
Which is more common, "underage" or "undergo"?
Remembering underage vs undergo
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “underage”; for a verb, it's “undergo”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “underage” entry
- Browse more pairs most likely to be confused. Most confusable