myasthenia
"myasthenia" is a 10-letter English headword indexed on PlainSpell.
The verdict
“myasthenia” is uncommon English (frequency #81,611 among 4,057 “M” headwords), classed as a noun. The kind of spelling people second-guess.
- #81,611
- frequency rank, English
- 4,057
- “M” headwords
According to Wiktionary data (CC BY-SA, analyzed September 2, 2026) - Abnormal weakness of the muscles; but especially myasthenia gravis.
Corpus desk
Index EN-myasthenia · myasthenia · English
myasthenia · rank #81,611 · 0 variants · 0 confusables
- FREQ-RARE #81,611
- LEN-MEGA 10 letters
- VOW-5 5 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,057
- PHOTO-FINISH mutuality
Nearest frequency peer: mutuality (-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.
Frequency neighbourhood for “myasthenia”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- muddling
muddling
18,396 corpus weight
- multipoint
multipoint
18,394 corpus weight
- mutuality
mutuality
18,391 corpus weight
- myasthenia
myasthenia
18,390 corpus weight
- Nahuatl
Nahuatl
18,384 corpus weight
- naltrexone
naltrexone
18,383 corpus weight
What this shows Bars show where “myasthenia” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | myasthenia |
| Language | English |
| Part of speech | Noun |
| Letters | 10 |
| Frequency rank | #81,611 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “myasthenia” sits in English frequency
Rare enough to double-check
myasthenia is uncommon English at frequency #81,611 among 4,057 “M” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Abnormal weakness of the muscles; but especially myasthenia gravis.".
myasthenia has no tracked misspelling variants, since its letter pattern doesn't lend itself to common typo substitutions. We don't track a confusable pairing for this entry, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From my- (“relating to muscle”) + asthenia (“weakness”), from Ancient Greek ἀσθένεια (asthéneia, “weakness”). By surface analysis, my- (“muscle”) + a- (“not”) + sthen- (“strength”) + -ia (“disease”). The correct English form is myasthenia, spelled M-Y-A-S-T-H-E-N-I-A.
Definition
- 1Abnormal weakness of the muscles; but especially myasthenia gravis.
Etymology
From my- (“relating to muscle”) + asthenia (“weakness”), from Ancient Greek ἀσθένεια (asthéneia, “weakness”). By surface analysis, my- (“muscle”) + a- (“not”) + sthen- (“strength”) + -ia (“disease”).
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 2, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "myasthenia", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 10 letters (nearest by frequency rank).
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.