Which to use
“undeniable” and “unreliable” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #18,726
- “undeniable” frequency rank
- #14,445
- “unreliable” frequency rank
- 33171
- confusion score
Side-by-Side Comparison
| Feature | undeniable | unreliable |
|---|---|---|
| Definition | Irrefutable, or impossible to deny. | Not reliable. |
Where the eye mixes undeniable and unreliable
Muted = shared; highlighted = the visual trap. They share 8 letters in sequence. undeniable and unreliable follow the identical consonant-vowel pattern (VCCVCVVCCV). Same shape at a glance is often the real trap, independent of shared letters.
Visual trap between undeniable and unreliable
A purely visual mix-up. undeniable (/ˌʌn.dɪˈnaɪ.(j)ə.bəɫ/) and unreliable (/ˌʌn.ɹɪˈlaɪ.ə.bl̩/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 33171, 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/. unreliable is at rank #14,445, tagged as anadj, pronounced /ˌʌn.ɹɪˈlaɪ.ə.bl̩/.
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 33171, this pair ranks #331,701 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of undeniable vs unreliable
Shared letters: abeilnu. Private to "undeniable": d. Private to "unreliable": r.
"undeniable" · 10 letters · shape VCCVCVVCCV · "unreliable" · 10 letters · shape VCCVCVVCCV
Known mistypes of this pair
- undeniable ← nudeniable · udneniable · unddeniable · undeinable · undenaible · undeniabble · undeniabel · undeniablle
- unreliable ← nureliable · unerliable · unnreliable · unreilable · unrelaible · unreliabble · unreliabel · unreliablle
Frequently Asked Questions
Is swapping "undeniable" for "unreliable" ever safe?
In ordinary English text, does "undeniable" or "unreliable" show up more?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "undeniable" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "unreliable" - compare definitions side by side with the headword page. Word entry
- This pair ranks #331,701 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "undeniable" and "unreliable" also get mixed up with nearby pairs, the highest-scored neighbour is "unreadable vs unreliable". 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 #331,701 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.