Coact :: Coact (v. t.) To force; to compel; to drive.
Coact :: Coact (v. i.) To act together; to work in concert; to unite.
Coaction :: Coaction (n.) Force; compulsion, either in restraining or impelling..
Coactive :: Coactive (a.) Serving to compel or constrain; compulsory; restrictive.
Coactive :: Coactive (a.) Acting in concurrence; united in action.