Synonym of PARAMOUR

Lover : a partner in a sexual or romantic relationship outside marriage.
Companion : a person or animal with whom one spends a lot of time or with whom one travels.
Friend : a person with whom one has a bond of mutual affection, typically one exclusive of sexual or family relations.
Rival : a person or thing competing with another for the same objective or for superiority in the same field of activity.
Paramour : a lover, especially the illicit partner of a married person.

Synonym of Paramour is Lover