slinger vs thrower

slinger and thrower both are nouns.

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

As nouns, thrower is a hypernym of slinger; that is, thrower is a word with a broader meaning than slinger:

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

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