1)The formation of words in imitation of natural sounds
2)An imitative word
3)The selection and use of such words 4)Simply, words that sound like what they are such as...
of or pertaining to a person who is bad at fitting a sound with the appropriate representational word, or onomatopoeia.
Hey, have you heard that commercial where the jingle goes ching ching at the beginning?
Nah dude, its definitly dahh dahh, you're just onomatopoeiaexic.