usage vs abuse

usage and abuse both are nouns.

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

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

usage (noun)	abuse (noun)
the act of using	improper or excessive use
accepted or habitual practice	cruel or inhumane treatment
the customary manner in which a language (or a form of a language) is spoken or written	a rude expression intended to offend or hurt

usage (verb)	abuse (verb)
	change the inherent purpose or function of something
	use wrongly or improperly or excessively
	use foul or abusive language towards
	treat badly