LEMvsLymeWhich spelling fits?

Quick tell: LEM is a noun, Lyme is a name, so they fill different roles in a sentence.

Which to use

“LEM” is a noun and “Lyme” is a name - they look or sound alike but fill different roles in a sentence.

#35,810
“LEM” frequency rank
#22,428
“Lyme” frequency rank
58238
confusion score

Side-by-Side Comparison

Feature LEM Lyme
Definition Originally Lunar Excursion Module, latterly Lunar Module. A town in New London County, Connecticut, United States.

Letter map: LEM vs Lyme

Shared letters muted; letters that set LEM and Lyme apart highlighted. Shared run: 2.

3 ch
LEM
4 ch
Lyme

Part-of-speech tell for LEM / Lyme

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: LEM is anoun and Lymeaname. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 58238, derived from the frequency rank of both members and their visual similarity.

LEM is recorded at frequency rank #35,810, classified as anoun. Lyme is at rank #22,428, tagged as aname.

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 58238, this pair ranks #113,872 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of LEM vs Lyme

Shared letters: elm. Private to "LEM": -. Private to "Lyme": y.

"LEM" · 3 letters · shape CVC  ·  "Lyme" · 4 letters · shape CVCV

Known mistypes of this pair

  • Lymellyme · lmye · lyem · lymme · lyyme · ylme

Frequently Asked Questions

Is swapping "LEM" for "Lyme" ever safe?
No - they are not even the same part of speech. "LEM" is a noun and "Lyme" a name, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "LEM" or "Lyme"?
"Lyme" is the more common of the two: it sits at frequency rank #22,428 in our English list, against #35,810 for "LEM". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "LEM" and "Lyme".

  • Full dictionary entry for "LEM" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Lyme" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #113,872 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "LEM" and "Lyme" also get mixed up with nearby pairs, the highest-scored neighbour is "LEM vs LSC". 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 #113,872 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list