amnesic vs mindless

amnesic is a noun but mindless is not a noun.

Word	Noun	Adjective	Verb	Adverb
amnesic	Yes	Yes	No	No
mindless	No	Yes	No	No

amnesic (noun)	mindless (noun)
a person suffering from amnesia

amnesic (adjective)	mindless (adjective)
of or relating to or caused by amnesia	not mindful or attentive
suffering from a partial loss of memory	devoid of intelligence or thought
	lacking the thinking capacity characteristic of a conscious being
	requiring little mental effort
	not marked by the use of reason