Below you can find the It's a 4-letter word for all the gear used for controlling a horse in harness racing Jeopardy Words Answer. The answer to It's a 4-letter word for all the gear used for controlling a horse in harness racing has 4 letters. This clue belongs to the Sports category and is part of Jeopardy Word Level 135. If you scroll near the bottom you will find other clues and answers part of level 135