density vs dense

density is a noun but dense is not a noun.

Word	Noun	Adjective	Verb	Adverb
density	Yes	No	No	No
dense	No	Yes	No	No

density (noun)	dense (noun)
the amount per unit size
the spatial property of being crowded together

density (adjective)	dense (adjective)
	having high relative density or specific gravity
	hard to pass through because of dense growth
	slow to learn or understand; lacking intellectual acuity
	permitting little if any light to pass through because of denseness of matter
	having component parts closely crowded together