protruding vs sticking out

protruding and sticking out both are adjectives.

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

As adjectives, protruding and sticking out are synonyms defined as:

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

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

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