cohabitation
/kəʊhæbɪˈteɪʃən/Definitions
1. noun
the act of living together with someone, especially as a married couple or in a romantic relationship, but not being married.
“The couple decided to start living together in a cohabitation arrangement to test their relationship before getting married.”
2. noun
a state or condition of living together in a shared space, often with a partner or family members.
“The cohabitation of the large family in the small house required some compromises and adjustments.”