Grandmas rhymes with:
grandma's, grandma's, grandma's, grandma's, grandma's, grandma's, kadrmas, panama's, arkansas', arkansas's, backsaws, cha-chas, grandma's, kadrmas, laboratoires, omaha's, panama's, tovaz
Grandmas sounds like:
grandma's, granting, grinding, grounding, grunting, guaranteeing