mindless vs heedfulness

mindless is not a noun while heedfulness is a noun.

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

mindless (noun)	heedfulness (noun)
	the trait of staying aware of (paying close attention to) your responsibilities

mindless (adjective)	heedfulness (adjective)
not mindful or attentive
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