Noun

• S: (n) thump, thumping, clump, clunk, thud (a heavy dull sound (as made by impact of heavy objects))
• S: (n) thump (a heavy blow with the hand)

Verb

• S: (v) beat, pound, thump (move rhythmically) "Her heart was beating fast"
• S: (v) thud, thump (make a dull sound) "the knocker thudded against the front door"
• S: (v) thump, pound, poke (hit hard with the hand, fist, or some heavy instrument) "the salesman pounded the door knocker"; "a bible-thumping Southern Baptist"