plunk vs crash-dive

plunk is a noun but crash-dive is not a noun.

Word	Noun	Adjective	Verb	Adverb
plunk	Yes	No	Yes	Yes
crash-dive	No	No	Yes	No

As verbs, crash-dive is a hyponym of plunk; that is, crash-dive is a word with a more specific, narrower meaning than plunk:

Other hyponyms of plunk include power-dive, nosedive, duck, chute, jump, parachute.

plunk (noun)	crash-dive (noun)
(baseball) hitting a baseball so that it drops suddenly
a hollow twanging sound

plunk (verb)	crash-dive (verb)
pull lightly but sharply with a plucking motion	descend steeply and rapidly
set (something or oneself) down with or as if with a noise
drop steeply
make or move along with a sound as of a horse's hooves striking the ground

plunk (adverb)	crash-dive (adverb)
with a short hollow thud