depose vs overthrow

depose is not a noun while overthrow is a noun.

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

As verbs, overthrow is a hyponym of depose; that is, overthrow is a word with a more specific, narrower meaning than depose:

Other hyponyms of depose include bring down, overturn, subvert.

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

depose (verb)	overthrow (verb)
make a deposition; declare under oath	rule against
force to leave (an office)	cause the downfall of; of rulers