MSL
"msl" is a 3-letter English headword indexed on PlainSpell.
The verdict
“MSL” is uncommon English (frequency #54,953 among 4,057 “M” headwords), classed as a noun. The kind of spelling people second-guess.
- #54,953
- frequency rank, English
- 4,057
- “M” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of mean sea level.
Corpus desk
Index EN-msl · MSL · English
MSL · rank #54,953 · 0 variants · 0 confusables
- FREQ-RARE #54,953
- LEN-MID 3 letters
- VOW-0 0 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,057
- PHOTO-FINISH mtDNA
Nearest frequency peer: mtDNA (+1 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.
Long-tail ranks near “MSL”
Sparse band: bars invert rank so rarer forms read shorter
- monopolize
monopolize
45,052 corpus weight
- MSL
MSL
45,048 corpus weight
- mtDNA
mtDNA
45,047 corpus weight
- mugger
mugger
45,046 corpus weight
- mui
mui
45,045 corpus weight
- Muldoon
Muldoon
45,044 corpus weight
What this shows Long-tail view: where “MSL” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | MSL |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #54,953 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “MSL” in English
Rare enough to double-check
MSL is uncommon English at frequency #54,953 among 4,057 “M” headwords, classed as anoun. Rarity is why readers land here mid-draft. 2 senses are on record.
No misspelling variants are generated for MSL in our index, a sign its spelling follows regular English conventions. No confusable counterpart is on file for this word, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: Abbreviation. The correct English form is MSL, spelled M-S-L.
Definition
- 1Initialism of mean sea level.
- 2Initialism of maritime/marine security, large; a type of cutter or (sovereignty, freedom-of-navigation, surveillance/reconnaissance) patrol vessel/craft/boat/ship.
Recorded use
Wiktionary exampleThese source excerpts show how MSL appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The company shard specific data from today’s flight on social media, revealing that the New Shepard capsule that carried Katy Perry, Gayle King and their crewmates to space hit 346,802 feet above ground level (AGL) and 350,449 above mean sea level (MSL).
Etymology
Abbreviation.
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "MSL", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).