Roommate is a synonym of housemate.
As nouns the difference between housemate and roommate
is that housemate is someone living in the same house while roommate is a person with whom one shares a room, as at university etc.
housemate
English
Noun
(
en noun)
Someone living in the same house.
Synonyms
* flatmate
* roommate
Anagrams
*
roommate
English
Noun
(
wikipedia roommate)
A person with whom one shares a room, as at university etc.
A person with whom one shares an apartment or house (UK: flatmate or housemate).
Derived terms
* roommatehood
Synonyms
* (informal) roomie
* (US ) flatmate, housemate