Congenital rhymes with:
genital, genital, genital, capital, deshotel, digital, extramarital, genital, intercapital, interdigital, marital, nonvolatile, occipital, orbital, parietal, pivotal, premarital, sagittal, skeletal, surrebuttal, vegetal, versatile, volatile
Congenital sounds like:
consequential, consequently, consonantal