Which to use
“lupin” and “lupus” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #34,579
- “lupin” frequency rank
- #22,427
- “lupus” frequency rank
- 57006
- confusion score
Side-by-Side Comparison
| Feature | lupin | lupus |
|---|---|---|
| Definition | Any member of the genus Lupinus in the family Fabaceae. | Any of a number of autoimmune diseases, the most common of which is systemic lupus erythematosus. |
Where the eye mixes lupin and lupus
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. lupin and lupus follow the identical consonant-vowel pattern (CVCVC). Same shape at a glance is often the real trap, independent of shared letters.
Visual trap between lupin and lupus
A purely visual mix-up. lupin (/ˈluːpɪn/) and lupus (/ˈluːpəs/) 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 57006, derived from the frequency rank of both members and their visual similarity.
lupin is recorded at frequency rank #34,579, classified as anoun, pronounced /ˈluːpɪn/. lupus is at rank #22,427, tagged as anoun, pronounced /ˈluːpəs/.
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 57006, this pair ranks #122,218 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of lupin vs lupus
Shared letters: lpu. Private to "lupin": in. Private to "lupus": s.
"lupin" · 5 letters · shape CVCVC · "lupus" · 5 letters · shape CVCVC
Known mistypes of this pair
Frequently Asked Questions
Can "lupin" and "lupus" be used interchangeably?
Frequency check: "lupin" vs "lupus" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "lupin" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "lupus" - compare definitions side by side with the headword page. Word entry
- This pair ranks #122,218 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "lupin" and "lupus" also get mixed up with nearby pairs, the highest-scored neighbour is "Lucan vs lupin". 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 #122,218 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.