If you say that one thing is synonymous with another, you mean that the two things are very closely associated with each other so that one suggests the other or one cannot exist without the other.
例句
Paris has always been synonymous with elegance, luxury and style...巴黎一直是优雅、奢华和时尚的代名词。Going grey is not necessarily synonymous with growing old...头发变白并不一定等于变老了。
英汉词典释义
adj.
同义的,类义的
His deeds had made his name synonymous with victory.他的英勇事迹使他的名字成了胜利的代名词。