thump

nouns

a heavy dull sound (as made by impact of heavy objects)
a heavy blow with the hand
is a type of (narrower)
a powerful stroke with the fist or a weapon
"a blow on the head"

verbs

move rhythmically
"Her heart was beating fast"
make a dull sound
"the knocker thudded against the front door"
is derived from
hit hard with the hand, fist, or some heavy instrument
"the salesman pounded the door knocker"; "a bible-thumping Southern Baptist"