1. capaciousness, roominess, breadth, comprehensiveness, largeness

usage: intellectual breadth; "the very capaciousness of the idea meant that agreement on fundamentals was unnecessary"; "his unselfishness gave him great intellectual roominess"

2. capaciousness, roominess, spaciousness, commodiousness, largeness, bigness

usage: spatial largeness and extensiveness (especially inside a building); "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"

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