Synonyms for Impact (same or very similar meaning)
WordNet sense 1 (a forceful consequence; a strong effect):
wallopWordNet sense 2 (the violent interaction of individuals or groups entering into combat):
shockWordNet sense 3 (influencing strongly):
encroachment, impingementWordNet sense 4 (have an effect upon):
affect, touch, affect, touch on, bear upon, bear onFrom the ODE community, based on WordNetadd/edit