subvert vs overturn

subvert is not a noun while overturn is a noun.

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

As verbs, subvert and overturn are synonyms defined as:

Other synonyms of subvert include bring down, overthrow.

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

subvert (verb)	overturn (verb)
to raze to the ground, also figuratively	change radically
cause the downfall of; of rulers	rule against
destroy property or hinder normal operations	cancel officially
corrupt morally or by intemperance or sensuality	turn from an upright or normal position
	cause to overturn from an upright or normal position
	cause the downfall of; of rulers