zwieback vs toast

zwieback and toast both are nouns.

Word	Noun	Adjective	Verb	Adverb
zwieback	Yes	No	No	No
toast	Yes	No	Yes	No

As nouns, toast is a hypernym of zwieback; that is, toast is a word with a broader meaning than zwieback:

zwieback: slice of sweet raised bread baked again until it is brown and hard and crisp
toast: slices of bread that have been toasted

zwieback (noun)	toast (noun)
slice of sweet raised bread baked again until it is brown and hard and crisp	slices of bread that have been toasted
	a drink in honor of or to the health of a person or event
	a celebrity who receives much acclaim and attention
	a person in desperate straits; someone doomed

zwieback (verb)	toast (verb)
	make brown and crisp by heating
	propose a toast to