immerse vs dunk

immerse is not a noun while dunk is a noun.

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

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

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

immerse (noun)	dunk (noun)
	a basketball shot in which the basketball is propelled downward into the basket

immerse (verb)	dunk (verb)
devote (oneself) fully to	dip into a liquid while eating
cause to be immersed	immerse briefly into a liquid so as to wet, coat, or saturate
thrust or throw into	make a dunk shot, in basketball
enclose or envelop completely, as if by swallowing