Grimace rhymes with:
amos, animous, animus, anonymous, artemus, autonomous, bemis, blasphemous, brademas, cadmus, christmas, christmas', clackamas, deltadromeus, demas, demus, dermis, domas, enormous, epidermis, erasmus, famous, hippopotamus, humus, ignoramus, imus, infamous, isthmus, lemus, litmus, los-palmas, lummus, magnanimous, mandamus, mcamis, mccomas, monogamous, nostradamus, paramus, paulhamus, polhemus, polygamous, posthumous, primus, promise, promus, pumice, pusillanimous, ramus, remus, seamus, shamas, shamus, st_thomas, synonymous, thalamus, thermos, thomas, trimas, ulmus, unanimous, varmus, venomous, warmus
Grimace sounds like:
garing, garms, garnes, garnica, garnish, garnishes, garnock, garnsey, garonzik, garron's, gawronski, gearan's, gearing, gehring, geraniums, gering, germain's, german's, germanic, germans, germans', germany's, germanys, germs, goehring, goering, goring, gorniak, gornick, gornik, graham's, grahams, grains, grames, gramm's, grammies, gramms, grammy's, grammys, grams, gramza, granese, grange, granges, grannies, grannis, granz, granzow, graunke, graying, green's, greene's, greenhouse, greenhouses, greeniaus, greening, greenish, greenness, greenough, greens, greens', greenwich, greenwich's, greinke, grenz, greunke, greying, grimaces, grimes, grimm's, grimness, grimshaw, grinage, grinch, gring, gringo, gringos, grinning, grins, groaning, groans, groening, groins, gromek, gromes, gromyko, gronowski, gronski, groomes, grooming, grooms, growing, grumman's, gruneich, grunge, grungy, guarnaccia, guernsey, guernseys, gurney's, gurnsey