ritual vs usage

ritual and usage both are nouns.

Word	Noun	Adjective	Verb	Adverb
ritual	Yes	Yes	No	No
usage	Yes	No	No	No

As nouns, usage is a hypernym of ritual; that is, usage is a word with a broader meaning than ritual:

Other hypernyms of ritual include custom, usance.

ritual (noun)	usage (noun)
any customary observance or practice	the act of using
the prescribed procedure for conducting religious ceremonies	accepted or habitual practice
stereotyped behavior	the customary manner in which a language (or a form of a language) is spoken or written

ritual (adjective)	usage (adjective)
of or relating to or employed in social rites or rituals
of or relating to or characteristic of religious rituals