mutton chop vs sideburn

mutton chop and sideburn both are nouns.

Word	Noun	Adjective	Verb	Adverb
mutton chop	Yes	No	No	No
sideburn	Yes	No	No	No

As nouns, mutton chop and sideburn are synonyms defined as:

mutton chop and sideburn: facial hair that has grown down the side of a man's face in front of the ears (especially when the rest of the beard is shaved off)

Other synonyms of mutton chop include burnside, side-whiskers.

mutton chop (noun)	sideburn (noun)
facial hair that has grown down the side of a man's face in front of the ears (especially when the rest of the beard is shaved off)	facial hair that has grown down the side of a man's face in front of the ears (especially when the rest of the beard is shaved off)
chop cut from a mature sheep