There is no suffix. The prefix homo- (same) is attached to the root word phone (sound), to mean a word that sounds the same as another word, e.g. here and hear.
The adjective forms of the noun homophone are homophonicand homophonous.
A homograph is a word of the same written form as another but of different meaning. It has no synonym.
homonym
alter altar
y
persecute
wee, oui
bare, bear
clothes, close
A homophone for "allow" that is also a synonym is "aloud."
Wee, which is a homophone for we.
Build is a homophone of billed.
plain (homophone for plane)
is there a homophone for deserve and obtain
Hole. The homophone to that is whole.
y
persecute
The word "build" is a homophone for the verb/adjective "billed."
clothes, close
wee, oui
bare, bear