groovy vs nifty

groovy and nifty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
groovy	No	Yes	No	No
nifty	No	Yes	No	No

As adjectives, groovy and nifty are synonyms defined as:

Other synonyms of groovy include bang-up, bully, corking, cracking, dandy, great, keen, neat, not bad, old, peachy, slap-up, smashing, swell.

groovy (adjective)	nifty (adjective)
(British informal) very chic	excellent
excellent