flitch vs bacon

flitch and bacon both are nouns.

Word	Noun	Adjective	Verb	Adverb
flitch	Yes	No	No	No
bacon	Yes	No	No	No

As nouns, bacon is a hypernym of flitch; that is, bacon is a word with a broader meaning than flitch:

flitch: salted and cured abdominal wall of a side of pork
bacon: back and sides of a hog salted and dried or smoked; usually sliced thin and fried

flitch (noun)	bacon (noun)
salted and cured abdominal wall of a side of pork	back and sides of a hog salted and dried or smoked; usually sliced thin and fried
fish steak usually cut from a halibut