"Avoid" is a verb on its own, meaning to keep away from or prevent from happening.
However, you might be thinking of a related word or concept:
* "-oid" is a suffix that means "resembling" or "having the characteristics of," like in "humanoid" (resembling a human).
* "Avoidance" is a noun that describes the act of avoiding something.
* "Avoidable" is an adjective that describes something that can be avoided.
Let me know if you have another word in mind, and I can help you find the correct suffix.