We volunteer at the 'homeless' shelter. [=a building where homeless people can sleep and get food]
a shelter for 'the homeless'
(..) You... ...who lack all... ."hono? I have seen how you treat your friends. We came to you once, starving, homeless... ...seeking your help. But you turned your back! You turned away from the suffering of my people... ...and the inferno that destroyed us. (..)2013 The Hobbit: The Desolation of Smaug