愛妾[aishou] beloved concubine
妾腹[shoufuku] illegitimate (e.g. born to a mistress)
妻妾[saishou] one's wife and mistress(es)
男妾[danshou] male paramour
妾出[shoushutsu] illegitimate (e.g. born to a mistress)

妾宅[shoutaku] house in which a mistress is kept
蓄妾[chikushou] keeping a mistress (concubine)
外妾[gaishou] foreigner's mistress
洋妾[youshou] Westerner's mistress

含蓄[ganchiku] implication
蓄音器[chikuonki] gramophone
蓄財[chikuzai] amassing of wealth
蓄積[chikuseki] accumulation
蓄積管[chikusekikan] storage tube

蓄電池[chikudenchi] storage battery
蓄膿症[chikunoushou] empyema
備荒貯蓄[bikouchochiku] famine-relief fund
備蓄[bichiku] emergency stores
備蓄米[bichikumai] reserved rice