salon vs front room

salon and front room both are nouns.

Word	Noun	Adjective	Verb	Adverb
salon	Yes	No	No	No
front room	Yes	No	No	No

As nouns, front room is a hypernym of salon; that is, front room is a word with a broader meaning than salon:

salon: elegant sitting room where guests are received
front room: a room in a private house or establishment where people can sit and talk and relax

Other hypernyms of salon include living-room, living room, parlor, parlour, sitting room.

salon (noun)	front room (noun)
elegant sitting room where guests are received	a room in a private house or establishment where people can sit and talk and relax
gallery where works of art can be displayed
a shop where hairdressers and beauticians work