vacate vs go back on

vacate and go back on both are verbs.

Word	Noun	Adjective	Verb	Adverb
vacate	No	No	Yes	No
go back on	No	No	Yes	No

As verbs, go back on is a hyponym of vacate; that is, go back on is a word with a more specific, narrower meaning than vacate:

Other hyponyms of vacate include renege, renege on, renegue on.

vacate (verb)	go back on (verb)
cancel officially	fail to fulfill a promise or obligation
leave behind empty; move out of
leave (a job, post, or position) voluntarily