monogamist
Noun
Meaning
One who practices or upholds monogamy.
Source: Webster's dictionarySynonyms
monogynist
bachelor
comrade
husband
partner
ally
companion
mate
colleague
bride
consort
groom
roommate
accomplice
bridegroom
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Antonyms
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Examples
I've always been a serial monogamist.
I'm a serial monogamist. I'm not one of those people that can date loads of people at the same time, it's all too complicated.
I am definitely a serial monogamist. I can count on one hand the number of guys I've been with.