Where two different numbers sound the same.
Depending on how it is said 18 & 80 ( eighteen and eighty. )
Also 7(seven) & 11(eleven).
A lot depends on the local accent and the hearing acuteness of the the listener.
eight, ate
The homonym of forth is fourth, which refers to the ordinal number following third.
The answer is which, but you mean homophone, not homonym.
The homonym of "drenched" is "drentched."
The homonym for "mourning" is "morning".
A homonym for "grays" is "greys."
The homonym for 'census' is 'sense'.
Was is a linking verb. It does not have a homonym.
The homonym for 'suite' is 'sweet'.
The homonym for chord is cord.
The homonym for "vale" is "veil."
The homonym of sauce is "source".
The homonym for 'build' is 'billed'.