thrower vs slinger

thrower and slinger both are nouns.

Word	Noun	Adjective	Verb	Adverb
thrower	Yes	No	No	No
slinger	Yes	No	No	No

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

thrower: someone who projects something (especially by a rapid motion of the arm)
slinger: a person who uses a sling to throw something

Other hyponyms of thrower include pelter, hurler, pitcher, twirler, tosser.

thrower (noun)	slinger (noun)
someone who projects something (especially by a rapid motion of the arm)	a person who uses a sling to throw something
a craftsman who shapes pottery on a potter's wheel and bakes them in a kiln
a person who twists silk or rayon filaments into a thread or yarn