Maybe love and pain are synonyms.

A synonym is a word you use when you can't spell the other one.

Nothing holds back human progress as frequently as the misbelief that the words ‘impossible’ and ‘improbable’ are synonyms.

I'd call him a sadistic, hippophilic necrophile, but that would be beating a dead horse.

A teacher of mine once said there are no true synonyms.

For a dreamer, pain and pleasure are synonyms.