Here are some possibilities for what you might have meant:
* Onomatopoeia: This is a literary device where words sound like the noises they describe, like "buzz," "sizzle," or "crash."
* Onomastics: This is the study of names and their origins.
* Onomatopeic: This is an adjective describing something that uses onomatopoeia.
If you could provide more context or clarify what you are looking for, I might be able to help further.