commodiousness vs spaciousness

commodiousness and spaciousness both are nouns.

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

As nouns, commodiousness and spaciousness are synonyms defined as:

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

Other synonyms of commodiousness include capaciousness, roominess.

commodiousness (noun)	spaciousness (noun)
spatial largeness and extensiveness (especially inside a building)	spatial largeness and extensiveness (especially inside a building)