Here's what rhymes with tetrapyrole.
role roll whole soul coal goal hole pole sole bowl fol mole poll toll knoll shoal dole droll foal bole boll thole troll vole kohl tole prole dolour patrol stole parole scroll stroll enroll unroll bedroll oriole rissole skoal control systole arteriole cajole petiole cubbyhole maypole glycerol casserole extol vacuole buttonhole condole decontrol pigeonhole camisole extoll beanpole innersole profiterole quadrupole