breadth, comprehensiveness, largeness -- (the capacity to understand a broad range of topics; "a teacher must have a breadth of knowledge of the subject"; "a man distinguished by the largeness and scope of his views")
largeness, extensiveness -- (large or extensive in breadth or importance or comprehensiveness; "the might have repercussions of unimaginable largeness"; "the very extensiveness of his power was a temptation to abuse it")
largeness, bigness -- (the property of having a relatively great size)
pretentiousness, pretension, largeness -- (the quality of being pretentious (behaving or speaking in such a manner as to create a false appearance of great importance or worth))