Synonyms for Tiptop (same or very similar meaning)
WordNet sense 1 (the highest level or degree attainable; the highest stage of development):
acme, elevation, height, meridian, peak, pinnacle, summit, superlative, topWordNet sense 2 (of the highest quality):
ace, crack, fantastic, first-rate, super, topnotch, A-one, topsWordNet sense 3 (of high or superior quality or performance):
superiorFrom the ODE community, based on WordNetadd/edit