peer group vs peer

peer group and peer both are nouns.

Word	Noun	Adjective	Verb	Adverb
peer group	Yes	No	No	No
peer	Yes	No	Yes	No

peer group (noun)	peer (noun)
contemporaries of the same status	a person who is of equal standing with another in a group
	a nobleman (duke or marquis or earl or viscount or baron) who is a member of the British peerage

peer group (verb)	peer (verb)
	look searchingly