Which to use
“last” is an adjective and “LSD” is a noun - they look or sound alike but fill different roles in a sentence.
- #15,138
- “last” frequency rank
- #30,142
- “LSD” frequency rank
- 45280
- confusion score
Side-by-Side Comparison
| Feature | last | LSD |
|---|---|---|
| Definition | Último. | Droga psicodélica semisintética que se obtiene de la ergolina y de la familia de las triptaminas que produce efectos psicológicos, entre los que se incluyen alucinaciones con ojos abiertos y cerrados, sinestesia, percepción distorsionada del tiempo y disolución del ego; generalmente utilizada como droga recreacional y dosificada en forma de un trozo de cartón que contiene la sustancia en sí. |
Where the eye mixes last and LSD
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Look-alike desk: last vs LSD
These two trip readers on the page rather than in the ear: last is /lɑːst/ while LSD is [ˈlsð̞]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 45280, derived from the frequency rank of both members and their visual similarity.
last is recorded at frequency rank #15,138, classified as anadj, pronounced /lɑːst/. LSD is at rank #30,142, tagged as anoun, pronounced [ˈlsð̞].
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 45280, this pair ranks #132,357 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of last vs LSD
Shared letters: ls. Private to "last": at. Private to "LSD": d.
"last" · 4 letters · shape CVCC · "LSD" · 3 letters · shape CCC
Known mistypes of this pair
- last ← alst · lasst · lastt · lats · llast · lsat
Frequently Asked Questions
Is swapping "last" for "LSD" ever safe?
Which is more common, "last" or "LSD"?
What to do next
Eye-level mix-up between "last" and "LSD" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "last" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "LSD" - compare definitions side by side with the headword page. Word entry
- This pair ranks #132,357 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "last" and "LSD" also get mixed up with nearby pairs, the highest-scored neighbour is "lac vs LSD". 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 #132,357 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.