这两个单词作为名词时仔细琢磨下还是有些差别的。1，在表示惯例，例行公事时基本上没有区别，但是ritual有种戏谑的意味，而routine更强调有规则性。2，ritual典礼, (宗教)仪式, 礼节；routine日常事务, （计算机科学）程序作为形容词时，后者多了Having no special quality; ordinary:的意思。
Difference: ritual n.1,a ceremony that is always performed in the same way, in order to mark an important religious or social occasion.routine n.1,a set of steps learned and practised by dancer for a public performance.ritual a.1,(only use before none)done as part of a rite.routine a.1,ordinary and boring. (routine job 枯燥乏味的工作)
