GAMES/World of Puzzles
May, 2020
Raymond Love

What two things can be done to each of the 20 words below to make 40 different common words? No letters are re-arranged.

BOARD            LET
BOUND            LINE
BOX                  MOST
COME               POURING
DOORS             PUT
FIELD               SET
FLOW               SIDE
GROWN           SOLE
HOUSE             TAKE
LAY                  WARDS

Answer:

Each of the words can be preceded by both IN and OUT:
INBOARD - OUTBOARD, etc.