subvert vs overthrow

subvert is not a noun while overthrow is a noun.

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

As verbs, subvert and overthrow are synonyms defined as:

Other synonyms of subvert include bring down, overturn.

subvert (noun)	overthrow (noun)
	the termination of a ruler or institution (especially by force)
	the act of disturbing the mind or body

subvert (verb)	overthrow (verb)
to raze to the ground, also figuratively	rule against
cause the downfall of; of rulers	cause the downfall of; of rulers
destroy property or hinder normal operations
corrupt morally or by intemperance or sensuality