Gustave rhymes with:
avi, davi, degrave, ghaznavi, mahvi, malave, mojave, mondavi, musavi, rysavy, schiavi, vodavi
Gustave sounds like:
gadhafi, gestapo, ghadafi, godbee, godbey, godby, godiva, good-bye, goodby, goodbye, goodtab, gostev, gustaf, gustav, gustava, gustavo