Cohabitant vs. Roommate

A person who cohabits with another

One who dwells with another, or in the same place or country.

Example: ‘No small number of the Danes became peaceable cohabitants with the Saxons in England.’;

A person with whom one shares a room, as at university etc.

A person (UK: flatmate, housemate, AU: sharemate) sharing the same home (sharehome).

One of two or more occupying the same room or rooms; one who shares the occupancy of a room or rooms; a chum.

an associate who shares a room with you

A roommate is a person with whom one shares a living facility such as a room or dormitory except when being family or romantically involved. Similar terms include dormmate, suitemate, housemate, or flatmate (: the usual term in British English for an apartment).

Example: ‘flat’;