Adjectives

(a)onomatopoeic, onomatopoeticof or relating to or characterized by onomatopoeia
(a)echoic, imitative, onomatopoeic, onomatopoeical, onomatopoetic(of words) formed in imitation of a natural sound“onomatopoeic words are imitative of noises”, “it was independently developed in more than one place as an onomatopoetic term” (Harry Hoijer)