Thesaurus

Synonyms for Outstanding include:

A-one, ace, all important, all-important, alpha, attention-getting, banner, best, beta, big, blue-ribbon, bold, boss, brag, brilliant, buckshee, burning, capital, cardinal, central, chief, choice, complimentary, consequential, conspicuous, Copernican, costless, crack, crucial, crying, distinguished, egregious, eminent, essential, eventful, excellent, eye-catching, fantabulous, fantastic, featured, first-class, first-rate, flagrant, free, fundamental, gilt-edged, glaring, grand, gratis, gratuitous, grave, great, greatest, grievous, gross, heavy, high-performance, historic, important, in evidence, in-chief, indiscreet, key, large, main, marked, measurable, most-valuable, non-paying, of import, of the essence, outstanding, owed, owing, premium, primal, primary, prime, principal, prize, pro bono, prominent, pucka, pukka, quality, rank, rent-free, salient, select, serious, shining, significant, spectacular, spiffing, sterling, strategic, striking, super, superb, superior, superlative, supreme, surpassing, tiptop, top-flight, top-hole, topnotch, topping, tops, transcendent, uncompensated, undischarged, unpaid, unsalaried, valuable, weapons-grade, weighty, well-made

outstanding is a ADJ.