hitting vs hopper

hitting and hopper both are nouns.

Word	Noun	Adjective	Verb	Adverb
hitting	Yes	No	No	No
hopper	Yes	No	No	No

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

hitting (noun)	hopper (noun)
the act of contacting one thing with another	(baseball) a hit that travels along the ground
	terrestrial plant-eating insect with hind legs adapted for leaping
	funnel-shaped receptacle; contents pass by gravity into a receptacle below
	a machine used for picking hops
	someone who hops