Thud

n.	1.	A dull sound without resonance, like that produced by striking with, or striking against, some comparatively soft substance; also, the stroke or blow producing such sound; as, the thrud of a cannon ball striking the earth. At every new thud of the blast, a sob arose. - Jeffrey. At intervals there came some tremendous thud on the side of the steamer. - C. Mackay.
v. i. & t.	1.	To make, or strike so as to make, a dull sound, or thud. Hardly the softest thudding of velvety pads. - A. C. Doyle. The waves break into spray, dash and rumble and thud below your feet. - H. F. Brown.

Noun	1.	thud - a heavy dull sound (as made by impact of heavy objects) Synonyms: clunk, thump, thumping, clump
Verb	1.	thud - make a dull sound; "the knocker thudded against the front door" Synonyms: thump
	2.	thud - strike with a dull sound; "Bullets were thudding against the wall"
	3.	thud - make a noise typical of an engine lacking lubricants Synonyms: crump, scrunch

1.		thud - Yet another metasyntactic variable (see foo). It is reported that at CMU from the mid-1970s the canonical series of these was "foo", "bar", "thud", "blat".
2.		thud - Rare term for the hash character, "#" (ASCII 35). See ASCII for other synonyms.

beat, bump, chink, click, clink, clop, clump, clunk, crump, dull thud, flick, flump, hit, pad, pat, patter, pitapat, pitter-patter, plump, plunk, pop, pound, rap, smite, strike, tap, thump, tick, tinkle, tunk, wham, whomp