So-so

Opposite words for so-so:
choice, optimal, great, excellent, distinguished, special, first-rate, matchless, intolerably, unsatisfactory, top, superlative, exceptional, top-notch, peerless, fine, first-class, sterling, fantastic, splendid, terrific, number one, unsurpassed, fabulous, sensational, swell, insufficient, stellar, superb, exquisite, a1, lacking, preeminent, supreme, par excellence, outstanding, prime, superior, maximum, classic, marvelous, unparalleled, capital, optimum, unacceptable, deficient, wanting, extraordinary, unacceptably, inadequate, unmatched, tip-top, nifty, grand.