poultry vs squab

poultry and squab both are nouns.

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

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

poultry: flesh of chickens or turkeys or ducks or geese raised for food
squab: flesh of a pigeon suitable for roasting or braising; flesh of a dove (young squab) may be broiled

Other hyponyms of poultry include chicken, poulet, volaille, Rock Cornish hen, guinea hen, dove, duck, goose, turkey.

poultry (noun)	squab (noun)
a domesticated gallinaceous bird thought to be descended from the red jungle fowl	an unfledged pigeon
flesh of chickens or turkeys or ducks or geese raised for food	a soft padded sofa
	flesh of a pigeon suitable for roasting or braising; flesh of a dove (young squab) may be broiled

poultry (adjective)	squab (adjective)
	short and fat