shallowness vs shallow

shallowness and shallow both are nouns.

Word	Noun	Adjective	Verb	Adverb
shallowness	Yes	No	No	No
shallow	Yes	Yes	Yes	No

shallowness (noun)	shallow (noun)
the quality of lacking physical depth	a stretch of shallow water
lack of depth of knowledge or thought or feeling

shallowness (adjective)	shallow (adjective)
	lacking physical depth; having little spatial extension downward or inward from an outer surface or backward or outward from a center
	not deep or strong; not affecting one deeply
	lacking depth of intellect or knowledge; concerned only with what is obvious

shallowness (verb)	shallow (verb)
	become shallow
	make shallow