BRAZE is a 5 letter word that starts with B.

1. \Braze\, v. i. [imp. & p. p. {Brazed}; p. pr. & vb. n.
   {Brazing}.] [F. braser to solder, fr. Icel. brasa to harden
   by fire. Cf. {Brass}.]
   1. To solder with hard solder, esp. with an alloy of copper
      and zinc; as, to braze the seams of a copper pipe.
   
   2. To harden. ``Now I am brazes to it.'' --Shak.
   
   

2. \Braze\, v. t. [AS. br[ae]sian, fr. br[ae]s brass. See
   {Brass}.]
   To cover or ornament with brass. --Chapman.