( Read word from C<, copy to WORDBUF, null-terminate, and
  return WORDBUF. )
: WORD
    0x0e RAM+ TOWORD ( a c )
    DUP EOT? IF OVER ! EXIT THEN
    BEGIN
        ( We take advantage of the fact that char MSB is
          always zero to pre-write our null-termination )
        OVER ! 1+ C< ( a c )
        OVER 0x2d ( 2e-1 for NULL ) RAM+ = OVER WS? OR
    UNTIL ( a c )
    SWAP DROP 0x0e RAM+ ( ws a )
    SWAP EOT? IF 4 OVER ! THEN ;