What is Adjective form of onomatopoeia?

There isn't a single, universally accepted adjective form of "onomatopoeia." However, here are some options depending on the specific nuance you want to convey:

Formal:

* Onomatopoeic: This is the most common and direct adjective form.

* Onomatopoeian: This is slightly less common but grammatically correct.

Informal:

* Sound-effect: This is a more descriptive and informal option.

* Imitative: This emphasizes the imitative quality of onomatopoeia.

* Word-painting: This refers to the vividness and descriptive nature of onomatopoeia.

Other options:

* Sound-evoking: This focuses on the ability of onomatopoeia to conjure sounds in the mind.

* Sound-symbolic: This emphasizes the relationship between sound and meaning in onomatopoeia.

The best choice will depend on the context and the specific meaning you want to convey.