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

懐旧[kaikyuu] recalling the old days
旧ソ連[kyuusoren] former Soviet Union
旧悪[kyuuaku] past misdeeds
旧衣[kyuui] worn-out clothes
旧詠[kyuuei] ancient poems

旧怨[kyuuen] old grudge
旧縁[kyuuen] old relationship
旧恩[kyuuon] old favors
旧仮名遣[kyuukanazukai] former (i.e. before the post-WWII reforms) kana usage in writing the readings of kanji