The Collaborative International Dictionary of English v.0.48:

Pauper \Pau"per\, n. [L. See Poor.]
   A very poor person; one without any means of support,
   especially one dependent on private or public charity. Also
   used adjectively; as, pauper immigrants, pauper labor.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "pauper":
   almsman, almswoman, bankrupt, beggar, break, bum, bust, casual,
   charity case, down-and-out, down-and-outer, fold up, hardcase,
   hobo, impoverish, indigent, insolvent, lazarus, mendicant,
   pauperize, penniless man, poor devil, poor man, poorling,
   starveling, tramp, vagrant, welfare client