Sloppy Joe vs sandwich

Sloppy Joe and sandwich both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sloppy Joe	Yes	No	No	No
sandwich	Yes	No	Yes	No

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

Sloppy Joe: ground beef (not a patty) cooked in a spicy sauce and served on a bun
sandwich: two (or more) slices of bread with a filling between them

Sloppy Joe (noun)	sandwich (noun)
ground beef (not a patty) cooked in a spicy sauce and served on a bun	two (or more) slices of bread with a filling between them

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