grab bag vs salmagundi

grab bag and salmagundi both are nouns.

Word	Noun	Adjective	Verb	Adverb
grab bag	Yes	No	No	No
salmagundi	Yes	No	No	No

As nouns, salmagundi is a hypernym of grab bag; that is, salmagundi is a word with a broader meaning than grab bag:

Other hypernyms of grab bag include assortment, miscellanea, miscellany, mixed bag, mixture, motley, potpourri, smorgasbord, variety.

grab bag (noun)	salmagundi (noun)
a container from which a person draws a wrapped item at random without knowing the contents	cooked meats and eggs and vegetables usually arranged in rows around the plate and dressed with a salad dressing
an assortment of miscellaneous items	a collection containing a variety of sorts of things