dart vs plunge

dart and plunge both are nouns.

Word	Noun	Adjective	Verb	Adverb
dart	Yes	No	Yes	No
plunge	Yes	No	Yes	No

As verbs, plunge is a hyponym of dart; that is, plunge is a word with a more specific, narrower meaning than dart:

dart (noun)	plunge (noun)
a sudden quick movement	a brief swim in water
a tapered tuck made in dressmaking	a steep and rapid fall
a small narrow pointed missile that is thrown or shot

dart (verb)	plunge (verb)
run or move very quickly or hastily	begin with vigor
move along rapidly and lightly; skim or dart	devote (oneself) fully to
move with sudden speed	cause to be immersed
	immerse briefly into a liquid so as to wet, coat, or saturate
	thrust or throw into
	fall abruptly
	drop steeply
	dash violently or with great speed or impetuosity