Which to use
“lunacy” is a noun and “Lundy” is a name - they look or sound alike but fill different roles in a sentence.
- #32,485
- “lunacy” frequency rank
- #44,314
- “Lundy” frequency rank
- 76799
- confusion score
Side-by-Side Comparison
| Feature | lunacy | Lundy |
|---|---|---|
| Definition | The state of being mad, insanity | An island in the Bristol Channel, off the coast of Devon, England, and included in Torridge district (OS grid ref SS14). |
Letter map: lunacy vs Lundy
Shared letters muted; letters that set lunacy and Lundy apart highlighted. Shared run: 4. lunacy runs 6 letters (CVCVCV) against Lundy's 5 (CVCCV) - the length gap alone is often enough to separate them once you know to check it.
Role in the sentence - lunacy and Lundy
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: lunacy is anoun and Lundyaname. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 76799, derived from the frequency rank of both members and their visual similarity.
lunacy is recorded at frequency rank #32,485, classified as anoun, pronounced /ˈluː.nə.si/. Lundy is at rank #44,314, tagged as aname.
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 76799, this pair ranks #29,098 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of lunacy vs Lundy
Shared letters: lnuy. Private to "lunacy": ac. Private to "Lundy": d.
"lunacy" · 6 letters · shape CVCVCV · "Lundy" · 5 letters · shape CVCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "lunacy" for "Lundy" ever safe?
In ordinary English text, does "lunacy" or "Lundy" show up more?
Useful next steps
You've compared "lunacy" and "Lundy". Here's where to go from here.
- Full dictionary entry for "lunacy" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "Lundy" - compare definitions side by side with the headword page. Word entry
- This pair ranks #29,098 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "lunacy" and "Lundy" also get mixed up with nearby pairs, the highest-scored neighbour is "Laney vs Lundy". 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 #29,098 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.