Which to use
“LEM” is a noun and “lest” is a conjunction - they look or sound alike but fill different roles in a sentence.
- #35,810
- “LEM” frequency rank
- #14,158
- “lest” frequency rank
- 49968
- confusion score
Side-by-Side Comparison
| Feature | LEM | lest |
|---|---|---|
| Definition | Originally Lunar Excursion Module, latterly Lunar Module. | For fear that; that not; in order to prevent something from happening; in case. |
Letter map: LEM vs lest
Shared letters muted; letters that set LEM and lest apart highlighted. Shared run: 2.
Grammar separator: LEM vs lest
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: LEM is anoun and lestaconjunction. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 49968, derived from the frequency rank of both members and their visual similarity.
LEM is recorded at frequency rank #35,810, classified as anoun. lest is at rank #14,158, tagged as aconj, pronounced /lɛst/.
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 49968, this pair ranks #178,573 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of LEM vs lest
Shared letters: el. Private to "LEM": m. Private to "lest": st.
"LEM" · 3 letters · shape CVC · "lest" · 4 letters · shape CVCC
Known mistypes of this pair
- lest ← elst · lesst · lestt · llest · lset
Frequently Asked Questions
Can "LEM" and "lest" be used interchangeably?
Frequency check: "LEM" vs "lest" - which ranks higher?
After this comparison
You've compared "LEM" and "lest". Here's where to go from here.
- Full dictionary entry for "LEM" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "lest" - compare definitions side by side with the headword page. Word entry
- This pair ranks #178,573 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "LEM" and "lest" 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 #178,573 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.