旧套[kyuutou] conventionalism
外套[gaitou] overcoat
常套手段[joutoushudan] one's habitual practice (practise)
常套句[joutouku] cliche
常套語[joutougo] hackneyed expression

外套眼[gaitougan] mantle eye
外套膜[gaitoumaku] mantle (of an invertebrate)
旧套墨守[kyuutoubokushu] clinging to old customs
常套表現[joutouhyougen] conventional (stock) phrase
常套[joutou] conventionality