Which to use
“lah” and “lum” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #44,894
- “lah” frequency rank
- #47,736
- “lum” frequency rank
- 92630
- confusion score
Side-by-Side Comparison
| Feature | lah | lum |
|---|---|---|
| Definition | Alternative spelling of la. | A chimney; also, the top part of a chimney. |
Where the eye mixes lah and lum
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. lah and lum follow the identical consonant-vowel pattern (CVC). Same shape at a glance is often the real trap, independent of shared letters.
Visual trap between lah and lum
A purely visual mix-up. lah (/lɑː/) and lum (/lʌm/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 92630, derived from the frequency rank of both members and their visual similarity.
lah is recorded at frequency rank #44,894, classified as anoun, pronounced /lɑː/. 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 92630, this pair ranks #2,473 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of lah vs lum
Shared letters: l. Private to "lah": ah. Private to "lum": mu.
"lah" · 3 letters · shape CVC · "lum" · 3 letters · shape CVC
Frequently Asked Questions
Can "lah" and "lum" be used interchangeably?
Frequency check: "lah" vs "lum" - which ranks higher?
Useful next steps
Eye-level mix-up between "lah" and "lum" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "lah" 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 #2,473 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "lah" and "lum" also get mixed up with nearby pairs, the highest-scored neighbour is "LSC vs lum". Nearby pair
Confusion rank #2,473 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.