hamburger vs sandwich

hamburger and sandwich both are nouns.

Word	Noun	Adjective	Verb	Adverb
hamburger	Yes	No	No	No
sandwich	Yes	No	Yes	No

As nouns, sandwich is a hypernym of hamburger; that is, sandwich is a word with a broader meaning than hamburger:

hamburger: a sandwich consisting of a fried cake of minced beef served on a bun, often with other ingredients
sandwich: two (or more) slices of bread with a filling between them

hamburger (noun)	sandwich (noun)
beef that has been ground	two (or more) slices of bread with a filling between them
a sandwich consisting of a fried cake of minced beef served on a bun, often with other ingredients

hamburger (verb)	sandwich (verb)
	insert or squeeze tightly between two people or objects
	make into a sandwich