Justin's rhymes with:
austin's, boston's, boyleston's, boylston's, carstens, charleston's, cranston's, gaston's, hesston's, houston's, intestines, johnston's, jostens, karstens, livingston's, pistons, preston's, princeton's, ralston's, thaxton's
Justin's sounds like:
jetting, jostens, jousting, jueteng, jutting