The Collaborative International Dictionary of English v.0.48:
hospitalise \hos"pi*tal*ise\, v. t. To place (a person) in a hospital in order to receive medical treatment, for observation, or for rest. [Chiefly Brit.] Syn: hospitalize. [PJC]WordNet (r) 3.0 (2006):
hospitalise v 1: admit into a hospital; "Mother had to be hospitalized because her blood pressure was too high" [syn: hospitalize, hospitalise]