autograph vs inscribe

autograph is a noun but inscribe is not a noun.

Word	Noun	Adjective	Verb	Adverb
autograph	Yes	No	Yes	No
inscribe	No	No	Yes	No

As verbs, autograph and inscribe are synonyms defined as:

autograph (noun)	inscribe (noun)
something written by one's own hand
a person's own signature

autograph (verb)	inscribe (verb)
mark with one's signature	mark with one's signature
	address, (a work of literature) in a style less formal than a dedication
	write, engrave, or print as a lasting record
	convert ordinary language into code
	carve, cut, or etch into a material or surface
	draw within a figure so as to touch in as many places as possible
	register formally as a participant or member