What is an homonym for through?

There isn't a perfect homonym for "through" because it has two distinct pronunciations and meanings:

* "through" as in "going through a door" (pronounced with a long "oo" sound): There is no exact homonym for this pronunciation.

* "through" as in "thorough" (pronounced with a short "u" sound): The homonym for this pronunciation is "threw", which means to throw something.

So, it depends on the context and intended pronunciation of "through".