odds and ends vs potpourri

odds and ends and potpourri both are nouns.

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

As nouns, potpourri is a hypernym of odds and ends; that is, potpourri 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, salmagundi, smorgasbord, variety.

odds and ends (noun)	potpourri (noun)
a motley assortment of things	a jar of mixed flower petals and spices used as perfume
	a musical composition consisting of a series of songs or other musical pieces from various sources
	a collection containing a variety of sorts of things