paramour vs lover

paramour and lover both are nouns.

Word	Noun	Adjective	Verb	Adverb
paramour	Yes	No	No	No
lover	Yes	No	No	No

As nouns, lover is a hypernym of paramour; that is, lover is a word with a broader meaning than paramour:

paramour (noun)	lover (noun)
a woman who cohabits with an important man	a person who loves someone or is loved by someone
a woman's lover	an ardent follower and admirer
	a significant other to whom you are not related by marriage