bacon vs side of bacon

bacon and side of bacon both are nouns.

Word	Noun	Adjective	Verb	Adverb
bacon	Yes	No	No	No
side of bacon	Yes	No	No	No

As nouns, side of bacon is a hyponym of bacon; that is, side of bacon is a word with a more specific, narrower meaning than bacon:

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

Other hyponyms of bacon include flitch, gammon, bacon strip, Canadian bacon.

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