Here's what rhymes with observal.
servile chervil Words that almost rhyme with observal
reversal rehearsal dispersal inertial disbursal commercial universal transversal infomercial controversial noncommercial noncontroversial circle thermal verbal fertile hurdle vernal hurtle journal colonel purple kernel diurnal girdle turtle dermal hurtful deferral myrtle sternal gurgle curdle burble burgle eternal maternal paternal referral infernal nonverbal squirrel tubercle infertile encircle geothermal scleral subdural conferral forkful demurral external internal epidermal fraternal nocturnal epidural isothermal puerperal mirthful semicircle hydrothermal illiberal bicameral clitoral transferal