Thirteen's rhymes with:
argentines, bernstein's, carotenes, feldstein's, finkelstein's, hammerstein's, libertines, mangosteens, nicotine's, philistines, protein's, proteins, quarantines, seventeens, springsteen's
Thirteen's sounds like:
tardiness, tartness, teradyne's, thorton's, threading, threatening, threatens, thwarting, tiredness, trading, trading's, tradings, traditions, treading, treating, triton's, trotting