Take control of is a phrase that can be used to describe the act of taking power or authority over something. The crossword solutions for this phrase are USURP (5 letters), SEIZE (5 letters), HARNESS (7 letters), and OBSESS (6 letters). USURP means to take power or authority without legal right, SEIZE means to take hold of suddenly or forcibly, HARNESS means to bring under control for a particular purpose, and OBSESS means to preoccupy or dominate the thoughts or feelings of someone. All of these words describe the act of taking control of something in different ways.