In general, a stimulus is something that provokes or causes an action or response, as in Failing that test was the stimulus I needed to start studying harder. The plural of stimulus is stimuli. Its verb form is stimulate, which typically means to spur into action or to invigorate.

Is stimulation a verb?

verb (used with object), stim·u·lat·ed, stim·u·lat·ing. to rouse to action or effort, as by encouragement or pressure; spur on; incite: to stimulate his interest in mathematics. Physiology, Medicine/Medical. to excite (a nerve, gland, etc.) to its functional activity.

What is the verb for stimulate?

transitive verb. 1 : to excite to activity or growth or to greater activity : animate, arouse. 2a : to function as a physiological stimulus to.