polyamory
SMART Vocabulary: related words and phrases Marriage, cohabitation & other relationships
adulteress
affinal
as husband and wifeidiom
be an itemidiom
be shacked upidiom
have an affair
have something going with someoneidiom
hear wedding bellsidiom
hitched
honest
matrimonially
matrimony
monogamist
monogamous
ménage à trois
shack
shack up
situationship
something
together
Related words
polygamist
polygamous
polygamy | American Dictionary
polygamy
noun[ U ]
us/pəˈlɪɡ·ə·mi/
the custom or condition of being married to more than one person at the same time