Synonyms of optimum

1 Syllable
best, peak, a1
2 Syllables
highest, peerless, choice, matchless, perfect, choicest, select, besting, flawless, acme, superb, ideal, ace, greatest
3 Syllables
optimal, capital, maximum, gilt-edge, excellent, -carat
4 Syllables
unexcelled
5 Syllables
superlative