Synonyms for Numberless (same or very similar meaning)
WordNet sense 1 (too numerous to be counted):
countless, infinite, innumerable, multitudinous, myriad, uncounted, unnumbered, innumerous, unnumberable, unnumerableWordNet sense 2 (not capable of being computed or enumerated):
incalculableFrom the ODE community, based on WordNetadd/edit