bantam vs poultry

bantam and poultry both are nouns.

Word	Noun	Adjective	Verb	Adverb
bantam	Yes	Yes	No	No
poultry	Yes	No	No	No

As nouns, poultry is a hypernym of bantam; that is, poultry is a word with a broader meaning than bantam:

bantam: any of various small breeds of fowl
poultry: a domesticated gallinaceous bird thought to be descended from the red jungle fowl

Other hypernyms of bantam include domestic fowl, fowl.

bantam (noun)	poultry (noun)
any of various small breeds of fowl	a domesticated gallinaceous bird thought to be descended from the red jungle fowl
	flesh of chickens or turkeys or ducks or geese raised for food

bantam (adjective)	poultry (adjective)
very small