comprehensiveness
1. [ noun ] completeness over a broad scope
Synonyms: fullness
Related terms: completeness comprehensive
2. [ noun ] (psychology) an ability to understand a broad range of topics
Synonyms: breadth
Examples:

"a teacher must have a breadth of knowledge of the subject"

Related terms: intelligence
Similar spelling:   comprehensively
  comprehensive_school
  comprehensible
  comprehensibility
  comprehendible