ascendant at the head at the helm at the reins boss chief commanding controlling dominant general governing head hegemonic hegemonistic in ascendancy in authority in chief in command in control in custody in detention in hold in power in the ascendant in the saddle leading master on the throne overseeing paramount predominant predominate prepollent preponderant preponderate prepotent prevalent regnant regulating regulative regulatory reigning ruling sovereign superintendent supervising supervisory supreme under close arrest under house arrest