Onomatologist :: Onomatologist (n.) One versed in the history of names.
Onomatology :: Onomatology (n.) The science of names or of their classification.
Onomatope :: Onomatope (n.) An imitative word; an onomatopoetic word.
Onomatopoeia :: Onomatopoeia (n.) The formation of words in imitation of sounds; a figure of speech in which the sound of a word is imitative of the sound of the thing which the word represents; as, the buzz of bees; the hiss of a goose; the crackle of fire..