protruding vs projecting

protruding and projecting both are adjectives.

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

As adjectives, protruding and projecting are synonyms defined as:

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

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

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