Grimaced rhymes with:
grimmest, grimmest, grimmest, slimmest, alarmist, anatomist, animist, biochemist, calmest, dumbest, firmest, gamest, grimmest, pessimist, premised, promised, slimmest, taxidermist, warmest
Grimaced sounds like:
garnished, germicide, granquist, greenest, grimmest, grimstad, grinstead, gronseth