The Collaborative International Dictionary of English v.0.48:

Simulty \Sim"ul*ty\, n. [L. simultas a hostile encounter,
   drudge, originally, a (hostile) coming together, fr. simul
   together: cf. OF. simult['e].]
   Private grudge or quarrel; as, domestic simulties. [Obs.]
   --B. Jonson.
   [1913 Webster]