broth vs pot likker

broth and pot likker both are nouns.

Word	Noun	Adjective	Verb	Adverb
broth	Yes	No	No	No
pot likker	Yes	No	No	No

As nouns, pot likker is a hyponym of broth; that is, pot likker is a word with a more specific, narrower meaning than broth:

broth: liquid in which meat and vegetables are simmered; used as a basis for e.g. soups or sauces
pot likker: the liquid in which vegetables or meat have been cooked

Other hyponyms of broth include liquor, pot liquor, beef broth, beef stock, chicken broth, chicken stock, stock cube.

broth (noun)	pot likker (noun)
a thin soup of meat or fish or vegetable stock	the liquid in which vegetables or meat have been cooked
liquid in which meat and vegetables are simmered; used as a basis for e.g. soups or sauces