Grossmann rhymes with:
brossman, crossman, rossman, rossmann, bossman, brossman, cossman, crossman, glossman, gossman, kossman, mossman, rossman, rossmann, schlossman, wassman
Grossmann sounds like:
gargan, gargano, garrigan, garrison, garson, garzon, georgann, georgene, georgeson, georgian, georgiana, georgienne, georgina, georgine, gergen, gerken, gerkin, gershman, gershon, gershwin, gerson, goergen, gorgon, gorgone, gorgonian, graciano, graichen, grassman, grayson, graziani, graziano, greason, grecian, greeson, gregson, gresham, gressman, grierson, grignon, griscom, grisham, grishman, grissom, grisson, grogan, grosjean, grossman, groussman, grozny, gruesome, gurkin