deepness vs deep

deepness and deep both are nouns.

Word	Noun	Adjective	Verb	Adverb
deepness	Yes	No	No	No
deep	Yes	Yes	No	Yes

deepness (noun)	deep (noun)
the quality of being physically deep	a long steep-sided depression in the ocean floor
the extent downward or backward or inward	literary term for an ocean
a low pitch that is loud and voluminous	the central and most intense or profound part
the intellectual ability to penetrate deeply into ideas

deepness (adjective)	deep (adjective)
	having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center; sometimes used in combination
	relatively deep or strong; affecting one deeply
	exhibiting great cunning usually with secrecy
	strong; intense
	very distant in time or space
	difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge
	of an obscure nature
	intense or extreme
	large in quantity or size
	with head or back bent low
	having or denoting a low vocal or instrumental range
	marked by depth of thinking
	relatively thick from top to bottom
	extending relatively far inward
	(of darkness) densely dark