We don't have synonyms for tranche yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are trance, tranch and trache.
°One of a set of classes or risk maturities which comprise a multiple-class security, such as a CMO or REMIC; a class of bonds; collateralized mortgage obligations are structured with several tranches of bonds that have various maturities.
°One of a set of classes or risk maturities which comprise a multiple-class security, such as a CMO or REMIC; a class of bonds; collateralized mortgage obligations are structured with several tranches of bonds that have various maturities.