1: having the character of a synonym; also: alike in meaning or significance.
2: having the same connotations, implications, or reference.
“I had decided that if there was a God, he was a cruel sonofabitch to allow the things he allowed. Especially since he claimed his name was synonymous with love. It seemed to me that he was little more than a celestial Jack the Ripper, offering us, his whores, rewards with one hand, smiling and telling us he loved us, while with the other hand he held a shiny, sharp knife, the better with which to disembowel us.” – The Complete Drive-In, Joe R. Lansdale.