agitational
agitative
bait
bribe
carrot
catalyst
clout
compulsion
drive
driving force
encouragement
enticement
fillip
fomenting
goad
impellent
impelling
impelling force
impetus
impulse
impulsion
incendiary
incitement
inciting
incitive
inducement
inflammatory
influence
instigating
instigation
instigative
interest
invitation
irresistible force
lure
mainspring
moment
momentum
motivation
motive
motive power
payment
percentage
persuasive
assistance
benefit
bonus
challenge
compensation
contribution
disadvantage
fee
flexibility
goal
guidance
investment
opportunity
premium
reward
safeguard
sanction
saving
stimulus
subsidy
attentive
disincentive
inattentive
inventive
preventive