Sassafras rhymes with:
bluegrass, eelgrass, piepgras, shortgrass, snodgrass, tallgrass, airgas, amerigas, bluegrass, boardingpass, bumpass, bypass, eelgrass, energas, eyeglass, fiberglas, fiberglass, hourglass, jackass, landmass, outclass, overpass, piepgras, plexiglas, plexiglass, serfass, shortgrass, snodgrass, spyglass, sunglass, tallgrass, trespass, underclass, underpass, upperclass, worldpass, yankass
Sassafras sounds like:
sabers, sabres, safarik, safaris, safire's, safra's, sagebrush, sapphires, sassafras's, savarese, savers, savior's, saviors, savors, saybrook, schaberg, schaefers, schepers, schippers, scifres, seaberg, seabrook, seabrook's, seabrooks, seaburg, seafarers, seavers, seevers, severs, sevruga, sferrazza, sforza, shakespeare's, shapiro's, shapiros, shavers, shipper's, shippers, shipwreck, shivers, shoberg, shopper's, shoppers, shoppers', siebers, sievers, sifers, sjoberg, skipper's, skippers, sobers, sofer's, sparacio, sparaco, sparc, spares, spargo, spark, sparkes, sparks, sparky, sparrows, sparse, spears, speirs, speros, sperrazza, spheres, spiers, spires, spoor's, sporck, spores, spragg, sprague, sprague's, sprayers, sprays, sprees, sprick, sprigg, spriggs, sprizzo, sprock, sprogus, sprogus's, sprouse, spruce, spurge, spurious, spurs, sufferers, suffers, suffrage, superheroes, superhighway, superhighways, superior's, superiors, supers, superx, suppers, suppress, suppresses, sverige, sweepers, syphers