Which to use
“undoing” is a noun and “undying” is an adjective - they look or sound alike but fill different roles in a sentence.
- #26,292
- “undoing” frequency rank
- #32,634
- “undying” frequency rank
- 58926
- confusion score
Side-by-Side Comparison
| Feature | undoing | undying |
|---|---|---|
| Definition | The act of loosening or unfastening | permanent; never-ending; infinite |
Where the spellings diverge
Shared letters are muted; the letters that actually set undoing and undying apart are highlighted. They share 6 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: undoing is anoun and undyinganadjective. On the page they differ by a single letter - o in “undoing” becomes y in “undying”. Our composite confusion score for this pair is 58926, derived from the frequency rank of both members and their visual similarity.
undoing is recorded at frequency rank #26,292, classified as anoun, pronounced /ʌnˈduːɪŋ/. undying is at rank #32,634, tagged as anadj.
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 58926, this pair ranks #109,382 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of undoing vs undying
Shared letters: dginu. Private to "undoing": o. Private to "undying": y.
"undoing" · 7 letters · shape VCCVVCC · "undying" · 7 letters · shape VCCVVCC
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "undoing" and "undying" be used interchangeably?
Which is more common, "undoing" or "undying"?
Remembering undoing vs undying
The fastest way to pick the right one every time.
- Check the role first: if you need a noun, it's “undoing”; for an adjective, it's “undying”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “undoing” entry
- Browse more pairs most likely to be confused. Most confusable