quitrent

from The Collaborative International Dictionary of English v.0.48

Quitrent \Quit"rent`\ (kw[i^]t"r[e^]nt`), n. [Quit, a. + rent.]
   (Law)
   A rent reserved in grants of land, by the payment of which
   the tenant is quit from other service. --Blackstone.
   [1913 Webster]

   Note: In some of the United States a fee-farm rent is so
         termed. --Burrill.
         [1913 Webster]