loucovsLucConfusable pair

Quick tell: louco is a adjective, Luc is a noun, so they fill different roles in a sentence.

Which to use

“louco” is an adjective and “Luc” is a noun - they look or sound alike but fill different roles in a sentence.

#1,649
“louco” frequency rank
#15,850
“Luc” frequency rank
17499
confusion score

Side-by-Side Comparison

Feature louco Luc
Definition que perdeu a razão, maluco, demente, vesano, amente Lucas

Letter map: louco vs Luc

Shared letters muted; letters that set louco and Luc apart highlighted. Shared run: 3. louco runs 5 letters (CVVCV) against Luc's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.

5 ch
louco
3 ch
Luc

Part-of-speech tell for louco / Luc

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: louco is anadjective and Lucanoun. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 17499, derived from the frequency rank of both members and their visual similarity.

louco is recorded at frequency rank #1,649, classified as anadj. Luc is at rank #15,850, tagged as anoun, pronounced /lyk/..

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 17499, this pair ranks #53,737 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of louco vs Luc

Shared letters: clu. Private to "louco": o. Private to "Luc": -.

"louco" · 5 letters · shape CVVCV  ·  "Luc" · 3 letters · shape CVC

Known mistypes of this pair

  • louco ← llouco · locuo · loucco · louoc · luoco · oluco

Frequently Asked Questions

Can "louco" and "Luc" be used interchangeably?
No - they are not even the same part of speech. "louco" is an adjective and "Luc" a noun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "louco" vs "Luc" - which ranks higher?
"louco" is the more common of the two: it sits at frequency rank #1,649 in our Portuguese list, against #15,850 for "Luc". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pair "louco" vs "Luc" is on the table, pick a follow-up below.

  • Full dictionary entry for "louco" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Luc" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #53,737 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "louco" and "Luc" also get mixed up with nearby pairs, the highest-scored neighbour is "loch vs Luc". 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 #53,737 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list