brown sauce vs sauce

brown sauce and sauce both are nouns.

Word	Noun	Adjective	Verb	Adverb
brown sauce	Yes	No	No	No
sauce	Yes	No	Yes	No

As nouns, sauce is a hypernym of brown sauce; that is, sauce is a word with a broader meaning than brown sauce:

brown sauce: bouillon or beef stock thickened with butter and flour roux and variously seasoned with herbs or Worcestershire etc.
sauce: flavorful relish or dressing or topping served as an accompaniment to food

As nouns, sauce is a hypernym of brown sauce; that is, sauce is a word with a broader meaning than brown sauce:

brown sauce: a sauce based on soy sauce
sauce: flavorful relish or dressing or topping served as an accompaniment to food

brown sauce (noun)	sauce (noun)
bouillon or beef stock thickened with butter and flour roux and variously seasoned with herbs or Worcestershire etc.	flavorful relish or dressing or topping served as an accompaniment to food
a sauce based on soy sauce

brown sauce (verb)	sauce (verb)
	add zest or flavor to, make more interesting
	dress (food) with a relish
	behave saucily or impudently towards