Echoic is an adjective that refers to words or sounds that mimic or imitate the sound they describe. A few synonyms for echoic that can be used interchangeably include onomatopoeic, imitative, mimetic, and mimicking. Onomatopoeic specifically refers to words that are formed with the intention of imitating the sound they represent, while imitative and mimetic both describe the act of replicating or mimicking a sound or action. Mimicking is a more general term that can also be used to describe gestures, movements, or behaviors. All of these synonyms for echoic can be used to convey the same meaning and help to provide variety and clarity in written or spoken communication.