Carotene rhymes with:
guillotine, muscatine, nicotine, albertine, argentine, aronstein, augustine, bartlestein, boeschenstein, braunstein, brillstein, bronstein, buckstein, constantine, dobberstein, eckstein, egbertine, elbertine, elephantine, epstein, ernestine, feuerstein, fierstein, finkelstein, florentine, fromstein, glickstein, goberstein, grinstein, grubstein, grudenstein, guillotine, hammerstein, heseltine, holstein, konstantin, libertine, lichtenstein, lipstein, mangosteen, muscatine, nicotine, nothstein, osteen, pfundstein, philistine, protein, quarantine, rubinstein, safferstein, schottenstein, silberstein, silverstein, springsteen, vogelstein, wasserstein, wetstein, wintersteen, zumstein
Carotene sounds like:
caradine, caradonna, carden, cardin, cardoen, cardon, cardona, cardone, cardoni, cardoon, carton, cartoon, ceradyne, ceridian, certain, chardonnay, chretien, cordon, cordone, corradino, corten, cortin, cortina, cortine, courtenay, courtney, craton, crayton, creation, creeden, creedon, cretien, cretin, criton, croatian, crowden, cureton, curtain, curtin, cwiertnia