seating vs seating room

seating and seating room both are nouns.

Word	Noun	Adjective	Verb	Adverb
seating	Yes	No	No	No
seating room	Yes	No	No	No

As nouns, seating and seating room are synonyms defined as:

seating and seating room: an area that includes places where several people can sit

Other synonyms of seating include seating area, seats.

seating (noun)	seating room (noun)
the service of ushering people to their seats	an area that includes places where several people can sit
an area that includes places where several people can sit