front room vs sitting room

front room and sitting room both are nouns.

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

As nouns, front room and sitting room are synonyms defined as:

front room and sitting room: a room in a private house or establishment where people can sit and talk and relax

Other synonyms of front room include living-room, living room, parlor, parlour.

front room (noun)	sitting room (noun)
a room in a private house or establishment where people can sit and talk and relax	a room in a private house or establishment where people can sit and talk and relax