English to English

adjective (a)

• of or relating to or characterized by onomatopoeia(adj.pert)

  Synonym:
  onomatopoeic
  

  source: wordnet30
• (of words) formed in imitation of a natural sound(adj.all)

  Example:
  It was independently developed in more than one place as an onomatopoetic term.
  

  Synonym:
  echoic, imitative, onomatopoeic, onomatopoeical
  Antonym:
  nonechoic
  

  source: wordnet30
• Of or pertaining to onomatopœia; characterized by onomatopœia; imitative; as, an onomatopoetic writer or word.(adjective)

  source: webster1913