Dictionary.com
Thesaurus.com

Hospitaler

American  
[hos-pi-tl-er] / ˈhɒs pɪ tl ər /
Or Hospitaller

noun

  1. a member of the religious and military order Knights Hospitalers, or Knights of St. John of Jerusalem originating about the time of the first Crusade (1096–99) and taking its name from a hospital at Jerusalem.

  2. (lowercase) a person, especially a member of a religious order, devoted to the care of the sick or needy in hospitals.


Etymology

Origin of Hospitaler

First recorded in 1350–1400; hospital + -er 1; replacing Middle English hospitalier, from Middle French, from Medieval Latin hospitālārius; -ier 2