Which to use
“lay” is a verb and “lum” is a noun - they look or sound alike but fill different roles in a sentence.
- #2,302
- “lay” frequency rank
- #47,736
- “lum” frequency rank
- 50038
- confusion score
Side-by-Side Comparison
| Feature | lay | lum |
|---|---|---|
| Definition | To place down in a position of rest, or in a horizontal position. | A chimney; also, the top part of a chimney. |
Where the eye mixes lay and lum
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: lay vs lum
These two trip readers on the page rather than in the ear: lay is /leɪ/ while lum is /lʌm/. 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 (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 50038, derived from the frequency rank of both members and their visual similarity.
lay is recorded at frequency rank #2,302, classified as averb, pronounced /leɪ/. lum is at rank #47,736, tagged as anoun, pronounced /lʌm/.
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 50038, this pair ranks #177,954 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of lay vs lum
Shared letters: l. Private to "lay": ay. Private to "lum": mu.
"lay" · 3 letters · shape CVV · "lum" · 3 letters · shape CVC
Frequently Asked Questions
Can "lay" and "lum" be used interchangeably?
In ordinary English text, does "lay" or "lum" show up more?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "lay" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "lum" - compare definitions side by side with the headword page. Word entry
- This pair ranks #177,954 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "lay" and "lum" also get mixed up with nearby pairs, the highest-scored neighbour is "LSC vs lum". Nearby pair
Confusion rank #177,954 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.