alphabet soup vs salmagundi

alphabet soup and salmagundi both are nouns.

Word	Noun	Adjective	Verb	Adverb
alphabet soup	Yes	No	No	No
salmagundi	Yes	No	No	No

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

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

alphabet soup (noun)	salmagundi (noun)
soup that contains small noodles in the shape of letters of the alphabet	cooked meats and eggs and vegetables usually arranged in rows around the plate and dressed with a salad dressing
a confusing assortment	a collection containing a variety of sorts of things