hypersomnia
noun
hypersomnia is spelled H-Y-P-E-R-S-O-M-N-I-A: 11 letters. It appears about once in every 21 million words in written English, the 139,999th most frequent word form (wordfreq, 2021 data). As a noun, hypersomnia means “Excessive sleepiness” (English Wiktionary, September 2026). The plural of hypersomnia is hypersomnias.
How many letters and syllables are in hypersomnia?
| Letters | 11: H-Y-P-E-R-S-O-M-N-I-A |
|---|---|
| In writing | about once in every 21 million words; the 139,999th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is hypersomnia?
Hypersomnia appears about once in every 21 million words in written English, the 139,999th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce hypersomnia?
- US
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Flame,_not_lame-hypersomnia.wav, Wikimedia Commons (author and licence on each file's page).
Forms of hypersomnia
- hypersomnias plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does hypersomnia mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Excessive sleepiness.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Hypersomnia in Spanish, French, German and Portuguese
In the sense a state of drowsiness or sleepiness:
| Language | Words |
|---|---|
| French | hypersomnie |
| German | Schlafsucht, Hypersomnie |
| Spanish | hipersomnia |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.