Noun
The quality of being capacious, as of a vessel, a reservoir a bay, the mind, etc.
Source: Webster's dictionarythe capaciousness of Santa's bag astounded the child Source: Internet
roominess in this size car is always a compromise Source: Internet
his new office lacked the spaciousness that he had become accustomed to Source: Internet
the very capaciousness of the idea meant that agreement on fundamentals was unnecessary Source: Internet
his unselfishness gave him great intellectual roominess Source: Internet