overturn vs vacate

overturn is a noun but vacate is not a noun.

Word	Noun	Adjective	Verb	Adverb
overturn	Yes	No	Yes	No
vacate	No	No	Yes	No

As verbs, overturn and vacate are synonyms defined as:

Other synonyms of overturn include annul, countermand, lift, repeal, rescind, reverse, revoke.

overturn (noun)	vacate (noun)
the act of upsetting something
an improbable and unexpected victory

overturn (verb)	vacate (verb)
change radically	cancel officially
rule against	leave behind empty; move out of
cancel officially	leave (a job, post, or position) voluntarily
turn from an upright or normal position
cause to overturn from an upright or normal position
cause the downfall of; of rulers