decoy vs ground bait

decoy and ground bait both are nouns.

Word	Noun	Adjective	Verb	Adverb
decoy	Yes	No	Yes	No
ground bait	Yes	No	No	No

As nouns, ground bait is a hyponym of decoy; that is, ground bait is a word with a more specific, narrower meaning than decoy:

decoy: something used to lure fish or other animals into danger so they can be trapped or killed
ground bait: bait scattered on the water to attract fish

Other hyponyms of decoy include chum, fish lure, fisherman's lure, stool pigeon.

decoy (noun)	ground bait (noun)
something used to lure fish or other animals into danger so they can be trapped or killed	bait scattered on the water to attract fish
a beguiler who leads someone into danger (usually as part of a plot)

decoy (verb)	ground bait (verb)
lure or entrap with or as if with a decoy