1) All out 2) Complete 3) Concentrated 4) Cyclopedic 5) Full 6) Methodical 7) Thoroughgoing 8) Tiring 1) Complete 2) Comprehensive 3) Leaving no stone unturned 4) Like a thorough search 5) Thorough 6) Thoroughgoing 
• (a.) Serving or tending to exhaust; exhibiting all the facts or arguments; as, an exhaustive method.
Ex·haust'ive adjective Serving or tending to exhaust; exhibiting all the facts or arguments; as, an exhaustive method . 
complete thorough 
[adj] - very thorough
thorough adjective very thorough; exhaustively complete; `an exhaustive study`; `made a thorough search`; `thoroughgoing research`
exhausting a subject, topic, etc.; comprehensive; thorough: He published an exhaustive study of Greek vases. · tending to exhaust or drain, as resources or strength: a protracted, exhaustive siege of illness.
[SAT terms] performed comprehensively and completely