WordNet sense 1 (a person who acts as host at formal occasions (makes an introductory speech and introduces other speakers)):

emcee, master of ceremonies

WordNet sense 2 (the owner or manager of an inn):

boniface, innkeeper

WordNet sense 3 (archaic terms for army):

legion

WordNet sense 4 (a vast multitude):

horde

WordNet sense 5 ((computer science) a computer that provides client stations with access to files and printers as shared resources to a computer network):

server