D-day vs date

D-day and date both are nouns.

Word	Noun	Adjective	Verb	Adverb
D-day	Yes	No	No	No
date	Yes	No	Yes	No

D-day (noun)	date (noun)
date of the Allied landing in France, World War II	sweet edible fruit of the date palm with a single long woody seed
	a meeting arranged in advance
	a participant in a date
	the specified day of the month
	the present
	the particular day, month, or year (usually according to the Gregorian calendar) that an event occurred
	a particular day specified as the time something happens

D-day (verb)	date (verb)
	assign a date to; determine the (probable) date of
	provide with a dateline; mark with a date
	stamp with a date
	go on a date with
	date regularly; have a steady relationship with