The Oxford Thesaurus An A-Z Dictionary of Synonyms - affinityn.

1) relationship, kinship, closeness, alliance, connection or Brit connexion; sympathy, rapport: He felt an affinity with other redheaded people. 2) friendliness, fondness, liking, leaning, bent, inclination, taste, partiality, attractiveness, attraction: I have an affinity for the sea.