Same word as out-of-sight:
10, A-1, ace, bad, beyond compare, boss, capital, champion, chief, choicest, cool, culminating, finest, first, first-class, first-rate, foremost, greatest, highest, incomparable, inimitable, leading, matchless, nonpareil, number 1, optimum, out-of-sight, outstanding, paramount, peerless, perfect, preeminent, premium, prime, primo, principal, sans pareil, second to none, super, superlative, supreme, terrific, tops, tough, transcendent, unequaled, unparalleled, unrivaled, unsurpassed
10, A-1, ace, bad, beyond compare, boss, capital, champion, chief, choicest, cool, culminating, finest, first, first-class, first-rate, foremost, greatest, highest, incomparable, inimitable, leading, matchless, nonpareil, number 1, optimum, out-of-sight, outstanding, paramount, peerless, perfect, preeminent, premium, prime, primo, principal, sans pareil, second to none, super, superlative, supreme, terrific, tops, tough, transcendent, unequaled, unparalleled, unrivaled, unsurpassed