Meaning : The striking of one body against another.
Meaning : A forceful consequence. A strong effect.
Example :
The book had an important impact on my thinking.
The book packs a wallop.
Synonyms : wallop
Meaning : Influencing strongly.
Example :
They resented the impingement of American values on European culture.
Synonyms : encroachment, impingement
Meaning : The violent interaction of individuals or groups entering into combat.
Example :
The armies met in the shock of battle.
Synonyms : shock