The Collaborative International Dictionary of English v.0.48:

Worriment \Wor"ri*ment\, n. [See Worry.]
   Trouble; anxiety; worry. [Colloq. U. S.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

worriment
    n 1: a difficulty that causes anxiety [syn: troublesomeness,
         inconvenience, worriment]