Astor's rhymes with:
asters, casters, disasters, headmasters, lemasters, master's, masters, masters', mcmasters, pastor's, pastors, pilasters, plasters
Astor's sounds like:
actor's, actors, actors', actress, actress's, actresses, actuaries, actuators, agitators, ashtrays, asterisk, asters, astorga, astra's, astros, austrasia, austria's, awestruck