Diastase rhymes with:
lactase, maltase, aerospace, airbase, airspace, ambase, anyplace, birthplace, boldface, bookcase, bouillabaise, briefcase, broadbase, bucase, cityplace, commonplace, cyberspace, database, dbase, diabase, dnase, electrospace, everyplace, fireplace, footrace, innerspace, interface, lactase, lovelace, maltase, marketplace, orthoclase, outpace, parcplace, plagioclase, polymerase, reiterates, scarface, shoelace, showcase, showplace, someplace, staircase, steelcase, steeplechase, streptokinase, suitcase, sybase, typeface, wheelbase, workplace
Diastase sounds like:
dakota's, dakotas, dataquest's, de-excites, decade's, decades, deceits, decides, deciduous, decodes, dedicates, deducts, descoteaux, desiccates, destec, detects, dicots, dictates, didactic, digest's, digests, digitech, digitize, digits, dioxides, discotheque, discotheques, disgusts, diskettes, dissects, distasi, distasio, dockets, dogwoods, ducts, dugouts, dusts, dziedzic