chicken vs poultry

chicken and poultry both are nouns.

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

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

chicken: a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl
poultry: a domesticated gallinaceous bird thought to be descended from the red jungle fowl

Other hypernyms of chicken include domestic fowl, fowl.

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

chicken (noun)	poultry (noun)
a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl	a domesticated gallinaceous bird thought to be descended from the red jungle fowl
a foolhardy competition; a dangerous activity that is continued until one competitor becomes afraid and stops	flesh of chickens or turkeys or ducks or geese raised for food
the flesh of a chicken used for food
a person who lacks confidence, is irresolute and wishy-washy

chicken (adjective)	poultry (adjective)
easily frightened