Spur(Noun)= A device with a small spike or a spiked wheel that is worn on a rider's heel and used for urging a horse forward. It is similar to the word 'Stimulate'

Synonym: Propel, Trigger, Stimulate

Antonym: Discourage, Dissuade, Repress

Sample sentence:  The riders will be dressed in their Army Dress Blue uniform with riding breeches, boots and their silver spurs.