immerse vs plunge

immerse is not a noun while plunge is a noun.

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

As verbs, immerse and plunge are synonyms defined as:

Other synonyms of immerse include absorb, engross, engulf, soak up, steep.

As verbs, immerse and plunge are synonyms defined as:

As verbs, immerse and plunge are synonyms defined as:

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

Other hyponyms of immerse include dip, dunk, dip, douse, dunk, souse, dip, dip, submerge, submerse, soak, sheathe.

immerse (noun)	plunge (noun)
	a brief swim in water
	a steep and rapid fall

immerse (verb)	plunge (verb)
devote (oneself) fully to	begin with vigor
cause to be immersed	devote (oneself) fully to
thrust or throw into	cause to be immersed
enclose or envelop completely, as if by swallowing	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