The Collaborative International Dictionary of English v.0.48:

Sawarra nut \Sa*war"ra nut`\
   See Souari nut.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Souari nut \Sou*a"ri nut`\ (Bot.)
   The large edible nutlike seed of a tall tropical American
   tree (Caryocar nuciferum) of the same natural order with
   the tea plant; -- also called butternut. [Written also
   sawarra nut.]
   [1913 Webster]