dark vs lights-out

dark and lights-out both are nouns.

Word	Noun	Adjective	Verb	Adverb
dark	Yes	Yes	No	No
lights-out	Yes	No	No	No

dark (noun)	lights-out (noun)
an unenlightened state	(military) signal to turn the lights out
an unilluminated area	a prescribed bedtime
absence of light or illumination
absence of moral or spiritual values
the time after sunset and before sunrise while it is dark outside

dark (adjective)	lights-out (adjective)
devoid of or deficient in light or brightness; shadowed or black
(used of color) having a dark hue
brunet (used of hair or skin or eyes)
secret
causing dejection
stemming from evil characteristics or forces; wicked or dishonorable
showing a brooding ill humor
not giving performances; closed
marked by difficulty of style or expression
lacking enlightenment or knowledge or culture