Wiktionary
n. (context informal English) An especially large ship.
Usage examples of "supership".
The white plank of energy bent back on itself and bounced within the shield globe, filling the subspace dampening cocoon Voyager had woven around the Gimlon supership.
Both had maintenance men checking over the engines and filling the fuel tanks for the coming evacuation of Wolf personnel to the safety of the big superships waiting within the safety of the Chilean fjord.
After the fjord was extensively dredged to allow their access to open water, the giant superships began sailing the seven seas, carrying vast numbers of passengers and gargantuan cargos that had been thought inconceivable a few short years before.
Because they showed that leviathan superships could be profitable, it was not long before six other ships of comparable size were under construction.