The term 'peachy keen' is an informal phrase used to describe something that is very pleasing or satisfactory. The crossword solutions for this term are NIFTY (5 letters), SWELL (5 letters), dandy (5 letters), neato (5 letters), NEAT (4 letters), and DUCKY (5 letters). All of these words can be used to describe something that is very good, attractive, or desirable. NIFTY and SWELL are both slang terms that mean excellent or great. Dandy and neato are also slang terms that mean very good or cool. NEAT is a more formal term that means tidy or orderly. Finally, DUCKY is a slang term that means delightful or charming.