Which to use
“LSD” is a noun and “lus” is an adjective - they look or sound alike but fill different roles in a sentence.
- #26,788
- “LSD” frequency rank
- #12,613
- “lus” frequency rank
- 39401
- confusion score
Side-by-Side Comparison
| Feature | LSD | lus |
|---|---|---|
| Definition | Composé organique de la famille des ergolines, le diéthylamide de l’acide lysergique, dérivé de l’acide lysergique présent dans l’ergot de seigle, connu comme un hallucinogène très puissant actif à de très faibles doses. | Masculin pluriel de lu. |
Where the eye mixes LSD and lus
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses LSD with lus
These two trip readers on the page rather than in the ear: LSD is \ɛl.ɛs.de\ while lus is \ly\. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 39401, derived from the frequency rank of both members and their visual similarity.
LSD is recorded at frequency rank #26,788, classified as anoun, pronounced \ɛl.ɛs.de\. lus is at rank #12,613, tagged as anadj, pronounced \ly\.
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 39401, this pair ranks #248,244 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of LSD vs lus
Shared letters: ls. Private to "LSD": d. Private to "lus": u.
"LSD" · 3 letters · shape CCC · "lus" · 3 letters · shape CVC
Frequently Asked Questions
Can "LSD" and "lus" be used interchangeably?
Which is more common, "LSD" or "lus"?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "LSD" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "lus" - compare definitions side by side with the headword page. Word entry
- This pair ranks #248,244 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "LSD" and "lus" also get mixed up with nearby pairs, the highest-scored neighbour is "lep vs LSD". Nearby pair
Confusion rank #248,244 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.