onomasticon
/ˌɑː.noʊˈmæs.tɪkən/noun
onomasticon is a noun meaning “A book, list, or vocabulary of names, especially of people” (English Wiktionary, September 2026). It is spelled O-N-O-M-A-S-T-I-C-O-N and has 5 syllables, and it appears about once in every 79 million words in written English (wordfreq, 2021 data). The plural of onomasticon is onomasticons or onomastica.
What does onomasticon mean?
noun
- 1
A book, list, or vocabulary of names, especially of people.
We looked up the origin of her name in an onomasticon.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you pronounce onomasticon?
- UK /ˌɒ.nəʊˈmæs.tɪ.kən/
- US /ˌɑː.noʊˈmæs.tɪkən/
- US /ˌɑː.nəˈmæs.tɪkən/
Onomasticon has 5 syllables (counted from the pronunciation).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-onomasticon.ogg, Wikimedia Commons (author and licence on each file's page).
Forms of onomasticon
- onomasticons plural
- onomastica plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is onomasticon?
Onomasticon appears about once in every 79 million words in written English, the 282,993rd 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).