Hillegass rhymes with:
analogous, angus, argus, asparagus, batuigas, baugus, bodegas, boggus, bogus, cunnilingus, degas, distrigas, esophagus, fergus, fungus, gargus, gregus, hargus, heterozygous, hingis, homologous, homozygous, hugus, humongous, kilgus, landsbergis, las-vegas, las_vegas, lingus, lycurgus, margus, megace, negus, noriegas, ortegas, rogus, ruhrgas, sarcophagus, sprogus, tsongas, tsongas', vargas, vegas, vigus, wielgus, wilgus
Hillegass sounds like:
hailes, hails, hal's, halas, halasz, hale's, hales, haley's, halik, halko, hall's, hallas, halleck, hallelujah, hallisey, hallock, hallows, halls, hallways, halos, halsey, haluska, hauls, haulsey, hawley's, hayles, heals, healy's, heels, heilig, helga, helice, helios, helix, helke, hell's, hellacious, hellish, hellwig, helwig, hiles, hilke, hill's, hillas, hillegas, hillhouse, hilligoss, hillis, hillock, hills, hills', holck, holecek, holes, holick, holik, hollick, hollies, hollis, hollow's, hollows, holly's, hollyhock, hollyhocks, holsey, holyoak, holyoke, holz, holzschuh, howell's, howells, howls, hoylake, huallaga, hulce, hulce's, hulick, hulk, hulks, hull's, hulls, huls, hulse, hulsey, hylsa