1. capaciousness, commodiousness, roominess, spaciousness

spatial largeness and extensiveness (especially inside a building)

Example Sentences:
'the capaciousness of Santa's bag astounded the child'
'roominess in this size car is always a compromise'
'his new office lacked the spaciousness that he had become accustomed to'

Synonyms

• capaciousness
• commodiousness
• roominess