This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The study of the origins of names; onomastics.

n. The science of names or of their classification.

n. The branch of science which relates to the rules to be observed in the formation of names or terms.

n. The distinctive vocabulary used in any particular branch of study.

n. A discourse or treatise on names, or the history of the names of persons.

"Land was to be undertaken solely for the purpose of bringing back living specimens of the five-spotted Arctic woodcock -- _Philohela quinquemaculata_ -- in order to add to our onomatology and our glossary of onomatopoeia an ontogenesis of this important but hitherto unstudied sub-species."