Something that pains as if by pricking: Thorn. (Merriam – Webster)
Something that urges or stimulates into action: Spur. (Merriam – Webster)
A stick with a pointed or electrically charged end, for driving cattle, oxen, etc; prod. (Dictionary.com)
Anything that pricks or wounds like such a stick. (Dictionary.com)
Something that encourages, urges, or drives; a stimulus. (Dictionary.com)
Goad. Win every game.
Are You “Kicking Against the Goads”? Bible