nippy vs crisp

nippy is not a noun while crisp is a noun.

Word	Noun	Adjective	Verb	Adverb
nippy	No	Yes	No	No
crisp	Yes	Yes	Yes	No

As adjectives, nippy and crisp are synonyms defined as:

Other synonyms of nippy include frosty, nipping, snappy.

nippy (noun)	crisp (noun)
	a thin crisp slice of potato fried in deep fat

nippy (adjective)	crisp (adjective)
pleasantly cold and invigorating	pleasantly cold and invigorating
a sharp biting taste	brief and to the point; effectively cut short
	(of hair) in small tight curls
	(of something seen or heard) clearly defined
	pleasingly firm and fresh
	tender and brittle

nippy (verb)	crisp (verb)
	make brown and crisp by heating
	make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic