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
persecute
y
bare, bear
wee, oui
clothes, close
A homophone for "allow" that is also a synonym is "aloud."
"Minute" is a synonym for small and is a homophone of "my newt."
Build is a homophone of billed.
plain (homophone for plane)
Hole. The homophone to that is whole.
is there a homophone for deserve and obtain
y
persecute
"Raise" is a synonym for construct and erect that is also a homophone.
wee, oui
clothes, close
clothes, close