stickiness vs adhesion

stickiness and adhesion both are nouns.

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

As nouns, adhesion is a hyponym of stickiness; that is, adhesion is a word with a more specific, narrower meaning than stickiness:

stickiness: the property of sticking to a surface
adhesion: the property of sticking together (as of glue and wood) or the joining of surfaces of different composition

Other hyponyms of stickiness include adherence, adhesiveness, bond.

stickiness (noun)	adhesion (noun)
the property of sticking to a surface	faithful support for a cause or political party or religion
	the property of sticking together (as of glue and wood) or the joining of surfaces of different composition
	a fibrous band of scar tissue that binds together normally separate anatomical structures
	abnormal union of bodily tissues; most common in the abdomen