Sartain rhymes with:
partain, partain, abstain, aquitaine, ascertain, attain, brattain, buntain, butane, chastain, contain, costain, detain, entertain, fontaine, fountaine, lafountain, lafountaine, lamontagne, maintain, mustain, obtain, partain, pertain, petain, retain, stain, sustain, uptain
Sartain sounds like:
sardina, sardine, sardinha, sardinia, sartin, scardina, scardino, sciortino, scrotten, scrutiny, scruton, scrutton, secretion, seratonin, serotonin, sheraton, sheridan, shorten, sordoni, sortino, srdan