waiting room vs waiting area

waiting room and waiting area both are nouns.

Word	Noun	Adjective	Verb	Adverb
waiting room	Yes	No	No	No
waiting area	Yes	No	No	No

As nouns, waiting room and waiting area are synonyms defined as:

waiting room and waiting area: a room (as in a hotel or airport) with seating where people can wait

Other synonyms of waiting room include lounge.

waiting room (noun)	waiting area (noun)
a room (as in a hotel or airport) with seating where people can wait	a room (as in a hotel or airport) with seating where people can wait