lacvslackWhich spelling fits?

Quick tell: lac is a noun, lack is a verb, so they fill different roles in a sentence.

Which to use

“lac” is a noun and “lack” is a verb - they look or sound alike but fill different roles in a sentence.

#37,041
“lac” frequency rank
#12,118
“lack” frequency rank
49159
confusion score

Side-by-Side Comparison

Feature lac lack
Definition See 2. Person Singular Imperativ Präsens Aktiv des Verbs lacken

Same sound, different letters: lac vs lack

Muted letters are shared; highlighted letters are the only spelling cue when pronunciation matches. Shared run: 3 letters.

3 ch
lac
4 ch
lack

Homophone desk: lac vs lack

Say them out loud and nothing separates them: lac and lack carry the same recorded pronunciation, [lak]. Grammar is what tells them apart: one is anoun, the other averb, so most sentences will only accept one of them. They differ by 1 extra letter(s) - “lac” sits inside “lack”. Our composite confusion score for this pair is 49159, derived from the frequency rank of both members and their visual similarity.

lac is recorded at frequency rank #37,041, classified as anoun, pronounced [lak]. lack is at rank #12,118, tagged as averb, pronounced [lak].

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 49159, this pair ranks #1,221,952 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of lac vs lack

Shared letters: acl. Private to "lac": -. Private to "lack": k.

"lac" · 3 letters · shape CVC  ·  "lack" · 4 letters · shape CVCC

Known mistypes of this pair

  • lackalck · lacck · lackk · lakc · lcak · llack

Frequently Asked Questions

Can "lac" and "lack" be used interchangeably?
No - they are not even the same part of speech. "lac" is a noun and "lack" a verb, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "lac" vs "lack" - which ranks higher?
"lack" is the more common of the two: it sits at frequency rank #12,118 in our German list, against #37,041 for "lac". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

"lac" and "lack" share a sound, keep the gloss open, then jump to the headword or a nearby trap.

  • Full dictionary entry for "lac" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "lack" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,221,952 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "lac" and "lack" also get mixed up with nearby pairs, the highest-scored neighbour is "lac vs lame". 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 #1,221,952 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list