LukvslungWhich spelling fits?

Quick tell: Luk is a name, lung is a noun, so they fill different roles in a sentence.

Which to use

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

#45,495
“Luk” frequency rank
#6,070
“lung” frequency rank
51565
confusion score

Side-by-Side Comparison

Feature Luk lung
Definition A surname. A biological organ of vertebrates that controls breathing and oxygenates the blood.

Letter map: Luk vs lung

Shared letters muted; letters that set Luk and lung apart highlighted. Shared run: 2.

3 ch
Luk
4 ch
lung

Part-of-speech tell for Luk / lung

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: Luk is aname and lunganoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 51565, derived from the frequency rank of both members and their visual similarity.

Luk is recorded at frequency rank #45,495, classified as aname. lung is at rank #6,070, tagged as anoun, pronounced /ˈlʌŋ/.

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 51565, this pair ranks #164,403 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of Luk vs lung

Shared letters: lu. Private to "Luk": k. Private to "lung": gn.

"Luk" · 3 letters · shape CVC  ·  "lung" · 4 letters · shape CVCC

Known mistypes of this pair

  • lungllung · lnug · lugn · lungg · lunng · ulng

Frequently Asked Questions

Do "Luk" and "lung" mean the same thing in a sentence?
No - they are not even the same part of speech. "Luk" is a name and "lung" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "Luk" or "lung" show up more?
"lung" is the more common of the two: it sits at frequency rank #6,070 in our English list, against #45,495 for "Luk". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Done with this confusable. These links stay specific to "Luk" and "lung".

  • Full dictionary entry for "Luk" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "lung" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #164,403 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "Luk" and "lung" also get mixed up with nearby pairs, the highest-scored neighbour is "LSC vs Luk". 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 #164,403 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list