lungvslusoConfusable pair

Quick tell: lung is a noun, luso is an adjective, so they fill different roles in a sentence.

Which to use

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

#45,426
“lung” frequency rank
#44,297
“luso” frequency rank
89723
confusion score

Side-by-Side Comparison

Feature lung luso
Definition Pulmón. Originario, relativo a, o propio de Portugal.

Where the eye mixes lung and luso

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. lung (CVCC) and luso (CVCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

4 ch
lung
4 ch
luso

Look-alike desk: lung vs luso

These two trip readers on the page rather than in the ear: lung is /lʌŋ/ while luso is [ˈluso]. 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 89723, derived from the frequency rank of both members and their visual similarity.

lung is recorded at frequency rank #45,426, classified as anoun, pronounced /lʌŋ/. luso is at rank #44,297, tagged as anadj, pronounced [ˈluso].

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 89723, this pair ranks #2,948 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of lung vs luso

Shared letters: lu. Private to "lung": gn. Private to "luso": os.

"lung" · 4 letters · shape CVCC  ·  "luso" · 4 letters · shape CVCV

Known mistypes of this pair

  • lung ← llung · lnug · lugn · lungg · lunng · ulng
  • luso ← lluso · lsuo · luos · lusso · ulso

Frequently Asked Questions

Is swapping "lung" for "luso" ever safe?
No - they are not even the same part of speech. "lung" is a noun and "luso" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "lung" or "luso" show up more?
"luso" is the more common of the two: it sits at frequency rank #44,297 in our Spanish list, against #45,426 for "lung". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "lung" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "luso" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #2,948 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "lung" and "luso" also get mixed up with nearby pairs, the highest-scored neighbour is "longo vs lung". 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 #2,948 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list