Polyamory is a type of relationship where an individual has more than one intimate partner at the same time. In this case, all the people in the relationship are transparent about their partners. People who are in this type of relationship are called polyamorous. There are various types of polyamorous relationship based on boundaries an individual set for themselves.
Sources:
https://www.verywellmind.com/what-does-polyamorous-mean-21882
Cheating also known as infidelity and adultery is an act of being unfaithful with your partner. It is a breach of trust that an individual may have with their partner/s . Cheating is not restricted to
Consensual Non Monogamy (CNM) or Ethical Non-Monogamy (ENM) is an umbrella term the different types of non monogamous relationships that exist. Every individual's CNM is different and is based on the
Monogamy or monogamous relationships are when two individual are in an exclusive relationship with each other. This relationship can be both emotional and sexual in nature. Sources: https://www.merria