side of beef vs side of meat

side of beef and side of meat both are nouns.

Word	Noun	Adjective	Verb	Adverb
side of beef	Yes	No	No	No
side of meat	Yes	No	No	No

As nouns, side of meat is a hypernym of side of beef; that is, side of meat is a word with a broader meaning than side of beef:

side of beef: dressed half of a beef carcass
side of meat: a lengthwise dressed half of an animal's carcass used for food

Other hypernyms of side of beef include side.

side of beef (noun)	side of meat (noun)
dressed half of a beef carcass	a lengthwise dressed half of an animal's carcass used for food