Here are a few possibilities:
* "Will" as in the verb meaning "to want" or "to intend": The homonym is "wile," meaning "a trick or a crafty stratagem."
* "Will" as in the noun meaning "desire" or "determination": This has no exact homonym, but "wile" could be considered close in meaning.
* "Will" as in a legal document: This has no common homonym.
It's helpful to clarify what you mean by "will" when asking about homonyms.