Host

anfitrione

(person who receives or entertains a guest)

host

(computing: computer attached to a network)

moderatore

(moderator)

organizzatore

(person or organisation responsible for running an event)

ospitante

(person who receives or entertains a guest)

ospite

(biology: cell or organism which harbors another organism)

ostia

(consecrated bread — see also communion wafer)

ospitare

(perform the role of a host)