Synonyms for Impetus:

n.

attraction, capillary action, bonding, balance, absorbance, amplitude, air resistance, calorific, centripetal force, centrifugal force. encouragement, Stimulator, cause, push, fillip, stimulant, spur. act (noun)
impulsion, impulse.
causes (noun)
cause, influence, source, occasion, base, contributor, trigger, culprit.
force (noun)
purpose, spur, reason.
impetus (noun)
drift, impulsion, impulse.
motivation (noun)
impulse, incitement, incentive, inducement, stimulus, stimulation, provocation, motivation, energy, prod, drive, instigation, lure.
speed (noun)
gallop, speed, rapidity, velocity, rush, alacrity, celerity, quickness, swiftness, pace, hurry.
stimulus, force (noun)
energy, incitement, impulsion, impulse, spur, catalyst, stimulant, incentive, push, motivation.

Other synonyms:

Stimulator. catalyst, stimulant, spur. reason, fillip. encouragement. Other relevant words:
encouragement, spur, source, Stimulator, reason, fillip, drift, impulsion, stimulant, contributor, catalyst, push.

Usage examples for impetus

  1. He did not need any strengthening; only impetus ambition, aim, and some safeguarding by the way. – Winding Paths by Gertrude Page
  2. Neal sprang forward at the man's throat, grasped it, and, by the sheer impetus of his spring, bore the dragoon to the ground. – The Northern Iron 1907 by George A. Birmingham