The Collaborative International Dictionary of English v.0.48:

Resoun \Re*soun"\, v. i. & t.
   To resound. [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Resoun \Re*soun"\ (r?*z??n"), n.
   Reason. [Obs.] --Chaucer.
   [1913 Webster]