The definition of "comprehensive" is to include everything, so a comprehensive theory would be a theory that included everything.
Comprehensible is defined as capable of being understood or interpreted.
Comprehensive as an adjective means 'of large scope; covering or involving much;...
Beyond comprehension means the inability to understand something or someone.
There are five basic types of questions: Factual; Convergent; Divergent;...
Your spelling is correct of the word, comprehensive. .