odds and ends vs smorgasbord

odds and ends and smorgasbord both are nouns.

Word	Noun	Adjective	Verb	Adverb
odds and ends	Yes	No	No	No
smorgasbord	Yes	No	No	No

As nouns, smorgasbord is a hypernym of odds and ends; that is, smorgasbord is a word with a broader meaning than odds and ends:

Other hypernyms of odds and ends include assortment, miscellanea, miscellany, mixed bag, mixture, motley, potpourri, salmagundi, variety.

odds and ends (noun)	smorgasbord (noun)
a motley assortment of things	an assortment of foods starting with herring or smoked eel or salmon etc with bread and butter; then cheeses and eggs and pickled vegetables and aspics; finally hot foods; served as a buffet meal
	a collection containing a variety of sorts of things