caress vs nuzzle

caress is a noun but nuzzle is not a noun.

Word	Noun	Adjective	Verb	Adverb
caress	Yes	No	Yes	No
nuzzle	No	No	Yes	No

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

Other hyponyms of caress include paw, grope, dandle, pet, chuck, pat, nose, pet, tickle.

caress (noun)	nuzzle (noun)
a gentle affectionate stroking (or something resembling it)

caress (verb)	nuzzle (verb)
touch or stroke lightly in a loving or endearing manner	rub noses
	dig out with the snout
	move or arrange oneself in a comfortable and cozy position