chopper vs groundball

chopper and groundball both are nouns.

Word	Noun	Adjective	Verb	Adverb
chopper	Yes	No	No	No
groundball	Yes	No	No	No

As nouns, groundball is a hypernym of chopper; that is, groundball is a word with a broader meaning than chopper:

Other hypernyms of chopper include ground ball, grounder, hopper.

chopper (noun)	groundball (noun)
a grounder that bounces high in the air	(baseball) a hit that travels along the ground
a butcher's knife having a large square blade
an aircraft without wings that obtains its lift from the rotation of overhead blades
informal terms for a human `tooth'