悪疾[akushitsu] malignant or virulent disease
公務疾病[koumushippei] sickness incurred in line of duty
際疾い[kiwadoi] very close
歯牙疾患[shigashikkan] dental disease
疾っくに[tokkuni] long ago

疾患[shikkan] disease
疾走[shissou] sprint
疾病[shippei] illness
疾風[shippuu] gale
疾風迅雷[shippuujinrai] with lightning speed

一際[hitokiwa] conspicuously
学際的[gakusaiteki] interdisciplinary
真際[magiwa] on the verge of
金輪際[konrinzai] the deepest bottom of the earth
交際[kousai] company

交際家[kousaika] sociable person
交際嫌い[kousaigirai] unsociable
交際好き[kousaizuki] sociable
交際国[kousaikoku] friendly powers
交際社会[kousaishakai] society