lum
/lʌm/
"lum" is a 3-letter English headword indexed on PlainSpell.
The verdict
“lum” is a moderately-common English word, ranked #47,736 in English word frequency and used as a noun.
- #47,736
- frequency rank, English
- 3
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A chimney; also, the top part of a chimney.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | lum |
| Language | English |
| Part of speech | Noun |
| IPA | /lʌm/ |
| Letters | 3 |
| Frequency rank | #47,736 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “lum” sits in English frequency
Spelling & Dictionary Insight
The English entry for lum is 3 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /lʌm/. Corpus data places it at rank #47,736 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
We couldn't generate a plausible misspelling set for lum, a sign its spelling follows regular English conventions. It also participates in 20 confusable-pair relationships, "LV", "lx", "LZ", and more, where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: Borrowed from Scots lum, Early Scots lumb; further etymology uncertain, but probably from Cumbric *lümon, related to Welsh llumon (“chimney”) (obsolete), from Proto-Celtic *loimono. Possibly at least influenced by Old French lum (“light”), lume (“cooking fi… The correct English form is lum, spelled L-U-M.
Definition
- 1A chimney; also, the top part of a chimney.
- 2A chimney; also, the top part of a chimney.
Etymology
Borrowed from Scots lum, Early Scots lumb; further etymology uncertain, but probably from Cumbric *lümon, related to Welsh llumon (“chimney”) (obsolete), from Proto-Celtic *loimono. Possibly at least influenced by Old French lum (“light”), lume (“cooking fire”) (compare French lumière (“light; cavity or channel within a tube or tubular organ, lumen; opening”)), from Latin lūmen (“light; light source; opening through which light can penetrate such as an air-hole or window; opening or orifice in a water-pipe or funnel”), ultimately from Proto-Indo-European *lewk- (“bright; to see; to shine”).
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “lum”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is L-U-M - every other letter order is a misspelling in standard orthography.
- Say it as /lʌm/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “LV” - see the side-by-side comparison. lum vs LV
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.