tunaburger vs sandwich

tunaburger and sandwich both are nouns.

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

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

tunaburger: a sandwich that resembles a hamburger but made with tuna instead of beef
sandwich: two (or more) slices of bread with a filling between them

tunaburger (noun)	sandwich (noun)
a sandwich that resembles a hamburger but made with tuna instead of beef	two (or more) slices of bread with a filling between them

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