A person with whom one shares a living space.

सह-आवास

English Usage: I have a roommate who studies late into the night.

Hindi Usage: मेरी एक सह-आवास है जो रात तक पढ़ाई करती है।

Informal term for a roommate, usually implying a friendly or close relationship.

साथी

English Usage: My roomies and I threw a party last night.

Hindi Usage: मेरे साथियों ने कल रात एक पार्टी रखी।