selection vs smorgasbord

selection and smorgasbord both are nouns.

Word	Noun	Adjective	Verb	Adverb
selection	Yes	No	No	No
smorgasbord	Yes	No	No	No

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

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

selection (noun)	smorgasbord (noun)
the act of choosing or selecting	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
the person or thing chosen or selected	a collection containing a variety of sorts of things
a passage selected from a larger work
an assortment of things from which a choice can be made
a natural process resulting in the evolution of organisms best adapted to the environment