Consensual Non-Monogamy, Polygyny and Polygamy: Where the Difference Lies?

Polygamy, polygyny, consensual non-monogamy, serial monogamy. These notions seem to be alike, but are they synonymous? And what is the use of distinguishing between them? When in relationship that is different from monogamy, we face the need of attributing to it some presentment, of giving it a name. We study and define notions from the realm of alternative relationships in order to know what is correct to use for denoting our type of intimacy, and what is totally inappropriate. Details...