You have guard the profession, the object as in a guard rail, the verb as in to guard something. Many homonyms.
The homonym of "drenched" is "drentched."
The answer is which, but you mean homophone, not homonym.
Hour is a homonym for our.
The homonym for 'suite' is 'sweet'.
The homonym for 'census' is 'sense'.
Homonym for grays is graze
The homonym for "vale" is "veil."
The homonym for chord is cord.
Was is a linking verb. It does not have a homonym.
The homonym of sauce is "source".
The homonym for "mourning" is "morning".
The homonym for 'build' is 'billed'.