Noun

• 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) wallop (a severe blow)

Verb

• S: (v) whack, wham, whop, wallop (hit hard) "The teacher whacked the boy"
• S: (v) wallop (defeat soundly and utterly) "We'll wallop them!"