snappy vs nippy

snappy and nippy both are adjectives.

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

As adjectives, snappy and nippy are synonyms defined as:

Other synonyms of snappy include crisp, frosty, nipping.

snappy (adjective)	nippy (adjective)
pleasantly cold and invigorating	pleasantly cold and invigorating
quick and energetic	a sharp biting taste
marked by up-to-dateness in dress and manners
apt to speak irritably
smart and fashionable