sticky vs viscous

sticky and viscous both are adjectives.

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

As adjectives, sticky and viscous are synonyms defined as:

Other synonyms of sticky include gluey, glutinous, gummy, mucilaginous, pasty, viscid.

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