dark vs day

dark and day both are nouns.

Word	Noun	Adjective	Verb	Adverb
dark	Yes	Yes	No	No
day	Yes	No	No	No

dark (noun)	day (noun)
an unenlightened state	a period of opportunity
an unilluminated area	time for Earth to make a complete rotation on its axis
absence of light or illumination	a day assigned to a particular purpose or observance
absence of moral or spiritual values	the time after sunrise and before sunset while it is light outside
the time after sunset and before sunrise while it is dark outside	a point or period in time
	the recurring hours when you are not sleeping (especially those when you are working)
	an era of existence or influence
	the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
	the period of time taken by a particular planet (e.g. Mars) to make a complete rotation on its axis

dark (adjective)	day (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