sightless vs blind

sightless is not a noun while blind is a noun.

Word	Noun	Adjective	Verb	Adverb
sightless	No	Yes	No	No
blind	Yes	Yes	Yes	No

sightless (noun)	blind (noun)
	a protective covering that keeps things out or hinders sight
	a hiding place sometimes used by hunters (especially duck hunters)
	something intended to misrepresent the true nature of an activity
	people who have severe visual impairments, considered as a group

sightless (adjective)	blind (adjective)
lacking sight	unable to see
	not based on reason or evidence
	unable or unwilling to perceive or understand

sightless (verb)	blind (verb)
	make dim by comparison or conceal
	make blind by putting the eyes out
	render unable to see