stickiness vs sticky

stickiness is a noun but sticky is not a noun.

Word	Noun	Adjective	Verb	Adverb
stickiness	Yes	No	No	No
sticky	No	Yes	No	No

stickiness (noun)	sticky (noun)
the property of sticking to a surface

stickiness (adjective)	sticky (adjective)
	having the sticky properties of an adhesive
	hard to deal with; especially causing pain or embarrassment
	covered with an adhesive material
	hot or warm and humid
	moist as with undried perspiration and with clothing sticking to the body