Swell means stylish, excellent or wonderful.
Clean and in good order; trim; tidy
(Slang) Great; splendid; fine:
The definition of groovy is slang to describe something that is very good, fun, or nice looking.
Very good; better than expected but not as good as could be.
Amusingly clever; witty:
(Informal) Attractive or stylish:
(Slang) Very good, pleasing, etc.; excellent
(Slang) Excellent, good, funny, etc.
(Slang) Excellent, wonderful, delightful, etc.
Supremely great, good, etc.
Find another word for niftiest. In this page you can discover 14 synonyms, antonyms, idiomatic expressions, and related words for niftiest, like: swellest, neatest, keenest, grooviest, greatest, dandiest, smartest, sharpest, coolest, hottest and dreamiest.