onomatopoeical
1. [ adjective ] (of words) formed in imitation of a natural sound
Synonyms: imitative onomatopoeic onomatopoetic echoic
Examples:

"onomatopoeic words are imitative of noises" "it was independently developed in more than one place as an onomatopoetic term"- Harry Hoijer

Related terms: nonechoic
Similar spelling:   onomatopoeic
  onomatopoeia
  onomatopoetic
  onomatomania