LEM

noun

By · According to Wiktionary data (CC BY-SA) ·

"lem" is a 3-letter English headword indexed on PlainSpell.

The verdict

“LEM” sits in 20 confusable pairs (corpus #35,810) as a noun. The look-alike neighbours are the real trap.

#35,810
frequency rank, English
2,297
“L” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Originally Lunar Excursion Module, latterly Lunar Module.

Corpus desk

Index EN-lem · LEM · English

LEM · rank #35,810 · 0 variants · 20 confusables

  • FREQ-MID #35,810
  • LEN-MID 3 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-MID 2,297
  • PHOTO-FINISH Laredo

Nearest frequency peer: Laredo (-2 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Frequency neighbourhood for “LEM”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “LEM” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

LEM vs li
0% similar
LEM vs Lt
33% similar
LEM vs lo
0% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for LEM
PropertyValue
HeadwordLEM
LanguageEnglish
Part of speechNoun
Letters3
Frequency rank#35,810
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “LEM” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). LEM lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for LEM is neighbouring look-alikes ("li", "Lt", …), not just typos; it is anoun. Frequency #35,810 among 2,297 “L” headwords. 2 recorded senses keep meaning in play.

Zero misspellings are on record for LEM in our index, typically a sign the spelling maps closely to how the word sounds. It also participates in 20 confusable-pair relationships, "li", "Lt", "lo", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

No explicit etymology string is stored for this entry, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is LEM, spelled L-E-M.

Definition

  1. 1
    Originally Lunar Excursion Module, latterly Lunar Module.
  2. 2
    Law of excluded middle.

Recorded use

Wiktionary example

These source excerpts show how LEM appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. What constructive mathematicians know is that there are mathematical universes in which sets are like topological spaces and properties are like open sets. In fact, these universes are well-known to classical mathematicians (they are called toposes), but they look at them from “the outside”. When we consider what mathematicians who live in such a universe…

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.

PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 3, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.

Frequently Asked Questions

How do you spell "LEM"?
"LEM" is spelled L-E-M.
What does "LEM" mean?
As a noun, "LEM" means: Originally Lunar Excursion Module, latterly Lunar Module.
What words are commonly confused with "LEM"?
"LEM" is commonly confused with "li", "Lt", "lo". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "LEM" come from?
"LEM" is a English word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "LEM", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 3 letters (nearest by frequency rank).

kyu#35,806maa#35,817Jah#35,790IBA#35,762

What to do next

You've looked up "LEM". Here's where to go from here.

  • "LEM" maps to 20 confusable pairs in this vintage; the highest-scored is "li". View pair
  • Usage frequency rank #35,810 among English headwords in this corpus. Corpus statistics
  • Browse more English words in the "L" letter cohort. L–Z browse
  • PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day

PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.

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.

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

Source: FrequencyWords open word-frequency list