"the science of the rules observed in the formation of a name or names," 1790; from Greek onomat-, stem of onoma "word, name" (from PIE root *no-men- "name") + -logy. Related: Onomatologist.
onlooker
only
onnagata
onomastic
onomastics
onomatology
onomatopoeia
onomatopoeic
Onondaga
onrush
onset
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