lover vs paramour

lover and paramour both are nouns.

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

As nouns, paramour is a hyponym of lover; that is, paramour is a word with a more specific, narrower meaning than lover:

Other hyponyms of lover include fancy man, man, fancy woman, kept woman, mistress.

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