くる病[kurubyou] rickets
アルツハイマー病[arutsuhaimaabyou] Alzheimer's disease
ケーソン病[keesonbyou] caisson disease
ハンセン病[hansenbyou] Hansen's disease
マレック病[marekkubyou] Marek's disease

悪病[akubyou] bad health
胃病[ibyou] stomach trouble
遺伝病[idenbyou] hereditary (genetic) disease
いもち病[tounetsubyou] rice blight
疫病神[yakubyougami] jinx (lit: god of pestilence)

耄ける[bokeru] to grow senile
耄碌[mouroku] senility
老い耄れる[oiboreru] to become decrepit

老い耄れ[oibore] dotage
病み耄ける[yamihookeru] to become wasted by illness