The Collaborative International Dictionary of English v.0.48:

Hud \Hud\, n. [Cf. Hood a covering.]
   A huck or hull, as of a nut. [Prov. Eng.] --Wright.
   [1913 Webster]

WordNet (r) 3.0 (2006):

HUD
    n 1: the United States federal department that administers
         federal programs dealing with better housing and urban
         renewal; created in 1965 [syn: Department of Housing and
         Urban Development, Housing and Urban Development, HUD]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

HUD
       Head-Up Display (AG)