protruding vs sticking

protruding and sticking both are adjectives.

Word	Noun	Adjective	Verb	Adverb
protruding	No	Yes	No	No
sticking	No	Yes	No	No

As adjectives, protruding and sticking are synonyms defined as:

protruding and sticking: extending out above or beyond a surface or boundary

Other synonyms of protruding include jutting, projected, projecting, relieved, sticking out.

protruding (adjective)	sticking (adjective)
extending out above or beyond a surface or boundary	extending out above or beyond a surface or boundary