peer vs Lord

peer and Lord both are nouns.

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

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

peer: a nobleman (duke or marquis or earl or viscount or baron) who is a member of the British peerage
Lord: a titled peer of the realm

Other hypernyms of peer include noble, nobleman.

peer (noun)	Lord (noun)
a person who is of equal standing with another in a group	a titled peer of the realm
a nobleman (duke or marquis or earl or viscount or baron) who is a member of the British peerage	terms referring to the Judeo-Christian God

peer (verb)	Lord (verb)
look searchingly