Noun

• S: (n) plunk (a hollow twanging sound)
• S: (n) plunk, plunker ((baseball) hitting a baseball so that it drops suddenly)

Verb

• S: (v) clop, clump, clunk, plunk (make or move along with a sound as of a horse's hooves striking the ground)
• S: (v) plank, flump, plonk, plop, plunk, plump down, plunk down, plump (set (something or oneself) down with or as if with a noise) "He planked the money on the table"; "He planked himself into the sofa"
• S: (v) dive, plunge, plunk (drop steeply) "the stock market plunged"
• S: (v) pluck, plunk, pick (pull lightly but sharply with a plucking motion) "he plucked the strings of his mandolin"

Adverb

• S: (adv) plop, plunk (with a short hollow thud) "plop came the ball down to the corner of the green"