Minstar's rhymes with:
aerostar's, aerostars, morningstar's, northstar's, windstar's, aerostar's, aerostars, avatars, hectares, morningstar's, northstar's, windstar's
Minstar's sounds like:
master's, masters, masters', masterwork, masterworks, mastrich, mastrich's, mcdaris, mckitrick, mckittrick, mcwaters, mcwatters, megastores, meisters, mesothorax, minister's, ministers, ministers', ministries, ministry's, misters, mistress, mistresses, mixtures, monasteries, monsters, monstrous, moonstruck, mostar's, musketeers, musters, mysteries, mysterious