helm

chieftainship, commandership, directorship

forefront, lead, vanguard

captainship, chairmanship, deanship, dictatorship, generalship, governorship, kingship, mastership, mastery, premiership, presidency, presidentship, superintendency

dominance, dominion, jurisdiction, sovereignty (also sovranty), sway, upper hand

eminence, height, pedestal, pinnacle, seat, throne, top

commandeer, hijack (also highjack)