low-grade Antonyms

premium splendid star stellar sterling stupendous sublime super superb supereminent superior superlative supernal supreme surpassing swell spectacular special priceless prime primary primo principal prize prodigious quality rare remarkable sawyer select sensational smashing sovereign terrific top topping cordon bleu crackerjack pearler bang up groovy nifty Barrie blue chip boffo bonzer high quality marvellous high-grade fab