Which to use
“undead” is an adjective and “under” is a preposition - they look or sound alike but fill different roles in a sentence.
- #20,528
- “undead” frequency rank
- #180
- “under” frequency rank
- 20708
- confusion score
Side-by-Side Comparison
| Feature | undead | under |
|---|---|---|
| Definition | Not dead; alive. | Beneath; below; at or to the bottom of, or the area covered or surmounted by. |
Where the eye mixes undead and under
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Visual trap between undead and under
These two trip readers on the page rather than in the ear: undead is /ʌnˈdɛd/ while under is /ˈʌndə/. 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 preposition), which is usually the fastest check. Our composite confusion score for this pair is 20708, derived from the frequency rank of both members and their visual similarity.
undead is recorded at frequency rank #20,528, classified as anadj, pronounced /ʌnˈdɛd/. under is at rank #180, tagged as aprep, pronounced /ˈʌndə/.
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 20708, this pair ranks #429,253 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of undead vs under
Shared letters: denu. Private to "undead": a. Private to "under": r.
"undead" · 6 letters · shape VCCVVC · "under" · 5 letters · shape VCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "undead" for "under" ever safe?
In ordinary English text, does "undead" or "under" show up more?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "undead" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "under" - compare definitions side by side with the headword page. Word entry
- This pair ranks #429,253 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "undead" and "under" also get mixed up with nearby pairs, the highest-scored neighbour is "undead vs unseat". 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 #429,253 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.