beaut, beauty, bee's knees, cat's meow, corker, crackerjack(also crackajack), daisy, dandy, dilly, doozy(or doozie also doozer), dream, honey, hot stuff, humdinger, hummer, knockout, lollapalooza, lulu(slang), nifty, peach, pip, pippin, ripper, ripsnorter, snorter, sockdolager(or sockdologer), standout, sweetheart

marvel, phenomenon, prodigy, sensation, wondercatch, crown jewel, diamond, gem, imperial, jewel, pearl, plum, treasure

something else

bust, disappointment, dud, failure, flop, lemon, letdown, loser, stinker, turkey

A-OK, A1, awesome, bang-up, banner, beautiful, blue-chip, blue-ribbon, boffo, bonny(also bonnie, chiefly British), boss(slang), brag, brave, bully, bumper, capital, choice, classic, cool(slang), corking, crackerjack, cracking, dandy, divine, dope(slang), down(slang), dynamite, excellent, fab, fabulous, famous, fantabulous(slang), fantastic, fine, first-class, first-rate, first-string, five-star, four-star, frontline, gangbusters(also gangbuster), gilt-edged(or gilt-edge), gone(slang), grand, great, groovy, heavenly, high-class, hot, hype(slang), immense, keen, lovely, marvelous(or marvellous), mean, neat, nifty, noble, number one(also No. 1), numero uno, out-of-sight(slang), par excellence, peachy, peachy keen, phat(slang), prime, primo(slang), prize, prizewinning, quality, radical(slang), righteous(slang), sensational, slick, splendid, stellar, sterling, superb, superior, superlative, supernal, swell, terrific, tip-top, top, top-notch, top-of-the-line, top-shelf, topflight, topping(chiefly British), unsurpassed, wizard(chiefly British), wonderful

acceptable, adequate, all right, decent, good, OK(or okay), passable, satisfactory, tolerablebetter, exceptional, fancy, high-grade, high-test, premium, select, special, superfineclassical, standard, traditional

out of this world, too much