go back on vs vacate

go back on and vacate both are verbs.

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

As verbs, vacate is a hypernym of go back on; that is, vacate is a word with a broader meaning than go back on:

Other hypernyms of go back on include annul, countermand, lift, overturn, repeal, rescind, reverse, revoke.

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