Synonyms are not "for" anything; they just happen. Sometimes we pick up a word from another language or create a new word because we didn't know the old one or the difference between two words gets worn away. And then we end up with words that mean the same, which are synonyms.
What is synonym for merchant? What is synonym for merchant?
synonymize
What is the synonym government.
you are a synonym of abandoned.
a synonym to..?
no it is not a synonym
a synonym for abducting is kidnapping
A synonym for varied is diverse.
Testicles is the synonym for testes.
A synonym for temper is temperament.
Another name for the word synonym is poecilonym.
"Alternate word" is a noun-phrase that is kind of a synonym for the word "synonym. There is no one exact word that means the same as synonym.