Bitheismnoun
A form of dualism that recognizes two deities which are not in conflict or opposition (as good vs evil) but rather are in two exclusive forms or states (like male and female).
Bitheismnoun
Belief in the existence of two gods; dualism.
Duotheismnoun
Belief in the existence of two deities. This often refers to the belief in a god and goddess of roughly equal power, as is the case in Wicca.