roominess vs capaciousness

roominess and capaciousness both are nouns.

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

As nouns, roominess and capaciousness are synonyms defined as:

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

Other synonyms of roominess include commodiousness, spaciousness.

As nouns, roominess and capaciousness are synonyms defined as:

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