Give me a word for A heavy,dull thumping sound (word of 4 letters)?

noun

1. a heavy dull sound (as made by impact of heavy objects) [syn: thump]

verb

1. make a dull sound; “the knocker thudded against the front door”

2. strike with a dull sound; “Bullets were thudding against the wall”

3. make a noise typical of an engine lacking lubricants [syn: crump]