Grouting rhymes with:
routing, sprouting, doubting, flouting, outing, pouting, routing, scouting, shouting, spouting, sprouting, touting
Grouting sounds like:
garden's, gardenias, gardening, gardens, gardini's, gerding, girding, gordon's, gradations, grading, graduating, graduations, grating, greatness, greeting, greetings, gretna's, gritting, guardian's, guardians, guarding, gyrating, gyrations, gyrodynes