Synonyms for Best:

adj.

all (adjective)
better.
correct, right (adjective)
desirable.
excellent (adjective)
prime.
most (adjective)
largest.
most excellent (adjective)
supreme, optimum, prime, transcendent, unequaled, foremost, second to none, nonpareil, Culminating, incomparable, paramount, superlative, preeminent, finest, peerless, matchless, premium, leading, unrivaled, first, inimitable, champion, first-rate, unsurpassed, greatest, unparalleled, chief, highest.
optimal (adjective)
matchless.
optimum (adjective)
optimal.
peerless (adjective)
unrivaled, second to none, incomparable.
superior (adjective)
consummate, uppermost, controlling, leading, quintessential, furthest, paramount, supreme, king, A 1, most, master, eminent, Headmost, predominant, above, foremost, maximum, zenith, crowning, superior, ruling, elite, chosen, sovereign, champion, signal, furthermost, ascendant, dominant, better, choice, commanding, senior, chief.
top (adjective)
top, foremost, uppermost, loftiest, superior, most, highest, maximum, greatest.

n.

exponent, old hand, superman, maestro, queen, prodigy, excellent, past master, artist. noble, crush, smash, knock out, win, overpower, thrash, distinguished. desirable, wanted, dear, precious, optimal, desired, to die for, pet, longed-for, favored. big, first-rate, first class, greater, par excellence, there is no substitute for something, largest, larger, ideal, premier, second to none. flagship, the last word, the best, the gold standard, perfection, the Top Ten. fabled, well-known, celebrated, renowned, legendary, famous, the one and only, notorious, infamous, illustrious. most outstanding thing in class (noun)
elite, top, choice, prize.
worst (noun)
overcome, get the better of, defeat.

v.

competition (verb)
outdo.
defeat; gain advantage (verb)
excel, better, get the better of, outdo, surpass, overcome, exceed, outclass, outstrip, transcend, beat, master, thrash.
excel (verb)
exceed, cap, outperform, outdo, predominate, overshadow, eclipse, outclass, outstrip, transcend, beat, excel, surpass.

Other synonyms:

larger, first-rate, button-down, backless, brief, peerless, old hand, prodigy, casual, Clingy, greater, par excellence, A-LINE, largest, unrivaled, superman, artist, button-through, unparalleled, matchless, past master, baggy, boot-cut. overcome, queen, incomparable. exponent, first class. defeat. prize. first class
excellent.
supreme
superlative.

Usage examples for best

  1. I am sure he has tried his best to find something to do, he told me so. – The Second String by Nat Gould
  2. It was the best she could do. – Mary Rose of Mifflin by Frances R. Sterrett
  3. I'm not so sure that he isn't getting the best of it, when all's said and done! – Max by Katherine Cecil Thurston