life peer vs peer

life peer and peer both are nouns.

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

As nouns, peer is a hypernym of life peer; that is, peer is a word with a broader meaning than life peer:

life peer: a British peer whose title lapses at death
peer: a nobleman (duke or marquis or earl or viscount or baron) who is a member of the British peerage

life peer (noun)	peer (noun)
a British peer whose title lapses at death	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

life peer (verb)	peer (verb)
	look searchingly