thrower vs pelter

thrower and pelter both are nouns.

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

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

thrower: someone who projects something (especially by a rapid motion of the arm)
pelter: a thrower of missiles

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

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