Here's what rhymes with hei.
they say hay ae ay fay fe hey sei fey shay may day way pay re lay stay j array bay essay gay k ray che nay weigh sway fray slay yea dey ley rei sleigh whey fj jay kc lei payee rea rj tae wei zwei bey flay neigh cay roue spay away play survey clay gray grey obey pray okay prey spray cafe stray tray oj valet allay fillet ij ok passe bj bk drei saute tj tre bray dray brae filet inveigh splay moray nisei purvey sachet hooray trey aurae hurray aweigh today delay convey decay ballet dismay halfway repay astray attache bouquet cliche defray disarray overlay dossier crochet risque soiree souffle belay sorbet toupee noway overpay sickbay urethrae outstay reweigh copay display anyway everyday holiday betray disobey faraway cabaret francais gangway naturae puree replay toothache alleyway croquet lingerie parquet giveaway hideaway ricochet throwaway airplay byplay prepay resurvey soubriquet stowaway flyaway overplay overstay briquet caesurae layaway outplay umbrae bobsleigh misplay respray yesterday portray runaway underway vertebrae lamellae naivete papillae passageway protege sequelae waterway emigre matinee societe underlay fistulae getaway maxillae sobriquet wordplay workaday caraway castaway fibulae patellae pleurae stingray medullae underpay uvulae foldaway tearaway formulae interplay microarray nebulae breakaway scapulae straightaway carriageway takeaway underplay macrame roundelay copulae cybercafe walkaway cabriolet salmonellae penumbrae communique tarantulae trabeculae caravanserais companionway