plunge vs duck

plunge and duck both are nouns.

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

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

Other hyponyms of plunge include sop, dip, douse, dabble.

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

Other hyponyms of plunge include power-dive, nosedive, crash-dive, chute, jump, parachute.

plunge (noun)	duck (noun)
a brief swim in water	small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs
a steep and rapid fall	a heavy cotton fabric of plain weave; used for clothing and tents
	flesh of a duck (domestic or wild)
	(cricket) a score of nothing by a batsman

plunge (verb)	duck (verb)
begin with vigor	avoid or try to avoid fulfilling, answering, or performing (duties, questions, or issues)
devote (oneself) fully to	to move (the head or body) quickly downwards or away
cause to be immersed	submerge or plunge suddenly
immerse briefly into a liquid so as to wet, coat, or saturate	dip into a liquid
thrust or throw into
fall abruptly
drop steeply
dash violently or with great speed or impetuosity