roominess vs spaciousness

roominess and spaciousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
roominess	Yes	No	No	No
spaciousness	Yes	No	No	No

As nouns, roominess and spaciousness are synonyms defined as:

roominess and spaciousness: spatial largeness and extensiveness (especially inside a building)

Other synonyms of roominess include capaciousness, commodiousness.

roominess (noun)	spaciousness (noun)
spatial largeness and extensiveness (especially inside a building)	spatial largeness and extensiveness (especially inside a building)
intellectual breadth