usage vs practice

usage and practice both are nouns.

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

As nouns, practice is a hyponym of usage; that is, practice is a word with a more specific, narrower meaning than usage:

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

Other hypernyms of usage include pattern, survival.

usage (noun)	practice (noun)
the act of using	a customary way of operation or behavior
accepted or habitual practice	systematic training by multiple repetitions
the customary manner in which a language (or a form of a language) is spoken or written	the exercise of a profession
	translating an idea into action
	knowledge of how something is usually done

usage (verb)	practice (verb)
	learn by repetition
	engage in a rehearsal (of)
	carry out or practice; as of jobs and professions
	avail oneself to
	engage in or perform