Stochastic rhymes with:
sarcastic, bombastic, drastic, dynastic, ecclesiastic, elastic, enthusiastic, fantastic, fantastik, gymnastic, iconoclastic, inelastic, interscholastic, monastic, onomastic, plastic, sarcastic, scholastic, thermoplastic, unenthusiastic
Stochastic sounds like:
sadistic, southeast's, southwest's, stakeouts, statistic, statistics, statistics', statists