Noun

• S: (n) impact (the striking of one body against another)
• S: (n) impact, wallop (a forceful consequence; a strong effect) "the book had an important impact on my thinking"; "the book packs a wallop"
• S: (n) impingement, encroachment, impact (influencing strongly) "they resented the impingement of American values on European culture"
• S: (n) shock, impact (the violent interaction of individuals or groups entering into combat) "the armies met in the shock of battle"

Verb

• S: (v) impact (press or wedge together; pack together)
• S: (v) affect, impact, bear upon, bear on, touch on, touch (have an effect upon) "Will the new rules affect me?"