The term A-ONE is a slang term used to describe something of the highest quality. The crossword solutions for this term include TOPS (4 letters), SUPER (5 letters), BEST (4 letters), LHRIJ (5 letters), PRIMO (5 letters), SUPERB (6 letters), TIPTOP (6 letters), TOPNOTCH (8 letters), FINEDANDY (9 letters), FIRSTRATE (9 letters), TOPDRAWER (9 letters), and CRACKERJOHN (11 letters). All of these words are synonyms for A-ONE and can be used to describe something of the highest quality.