Which to use
“undeniable” is an adjective and “undeniably” is an adverb - they look or sound alike but fill different roles in a sentence.
- #18,726
- “undeniable” frequency rank
- #23,714
- “undeniably” frequency rank
- 42440
- confusion score
Side-by-Side Comparison
| Feature | undeniable | undeniably |
|---|---|---|
| Definition | Irrefutable, or impossible to deny. | In an undeniable manner, or to an undeniable extent. |
Where the spellings diverge
Shared letters are muted; the letters that actually set undeniable and undeniably apart are highlighted. They share 9 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: undeniable is anadjective and undeniablyanadverb. On the page they differ by a single letter - e in “undeniable” becomes y in “undeniably”. Our composite confusion score for this pair is 42440, derived from the frequency rank of both members and their visual similarity.
undeniable is recorded at frequency rank #18,726, classified as anadj, pronounced /ˌʌn.dɪˈnaɪ.(j)ə.bəɫ/. undeniably is at rank #23,714, tagged as anadv.
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 42440, this pair ranks #249,198 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of undeniable vs undeniably
Shared letters: abdeilnu. Private to "undeniable": -. Private to "undeniably": y.
"undeniable" · 10 letters · shape VCCVCVVCCV · "undeniably" · 10 letters · shape VCCVCVVCCV
Known mistypes of this pair
- undeniable ← nudeniable · udneniable · unddeniable · undeinable · undenaible · undeniabble · undeniabel · undeniablle
- undeniably ← nudeniably · udneniably · unddeniably · undeinably · undenaibly · undeniabbly · undeniablly · undeniablyy
Frequency comparison
Frequently Asked Questions
Can "undeniable" and "undeniably" be used interchangeably?
Which is more common, "undeniable" or "undeniably"?
Remembering undeniable vs undeniably
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “undeniable”; for an adverb, it's “undeniably”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “undeniable” entry
- Browse more pairs most likely to be confused. Most confusable