肝硬変[kankouhen] cirrhosis of the liver
強硬[kyoukou] firm
強硬派[kyoukouha] diehards
硬い[katai] hard
硬化[kouka] hardening

硬貨[kouka] coin
硬球[koukyuu] hard ball
硬玉[kougyoku] jadeite
硬骨[koukotsu] bone
硬式[koushiki] hardball (tennis, baseball)

眼軟膏[gannankou] eye ointment
膏薬[kouyaku] plaster
石膏[sekkou] plaster
軟膏[nankou] ointment
二股膏薬[futamatakouyaku] double-dealer

膏汗[aburaase] cold sweat
絆創膏[bansoukou] adhesive plaster
内股膏薬[uchimatakouyaku] double-dealer
膏血[kouketsu] (hard-earned rewards of) sweat and blood