Thud
WordNet
noun
(1) A heavy dull sound (as made by impact of heavy objects)
verb
(2) Strike with a dull sound
"Bullets were thudding against the wall"
(3) Make a dull sound
"The knocker thudded against the front door"
(4) Make a noise typical of an engine lacking lubricants
WiktionaryText
Noun
- The sound of a dull impact.
- Republic F-105 Thunderchief jet ground attack fighter, after the sound it makes when it crashed into the North Vietnamese countryside, due to its high rate of loss.