on·o·mat·o·poe·ia 
(ŏn′ə-măt′ə-pēə, -mä′tə-)
(ŏn′ə-măt′ə-pēə, -mä′tə-)n.
The formation or use of words such as buzz or murmur that imitate the sounds associated with the objects or actions they refer to.
[Late Latin, from Greek onomatopoiiā, from onomatopoios, coiner of names : onoma, onomat-, name; see n-men- in the Appendix of Indo-European roots + poiein, to make; see kwei-2 in the Appendix of Indo-European roots.]
on′o·mat′o·poeic, on′o·mat′o·po·etic (-pō-ĕtĭk) adj.
on′o·mat′o·poei·cal·ly, on′o·mat′o·po·eti·cal·ly adv.