A*mu"sive*ness

from The Collaborative International Dictionary of English v.0.48

Amusive \A*mu"sive\ (?; 277), a.
   Having power to amuse or entertain the mind; fitted to excite
   mirth. [R.] -- {A*mu"sive*ly}, adv. -- {A*mu"sive*ness}, n.
   [1913 Webster]