購読[koudoku] paid subscription (e.g. magazine)
購読料[koudokuryou] subscription charge
購入[kounyuu] purchase
購入者[kounyuusha] purchaser
購入注文[kounyuuchuumon] purchase order

購買[koubai] procurement
購買力[koubairyoku] buying power
直接購入[chokusetsukounyuu] direct purchase
購う[aganau] to compensate
購入先[kounyuusaki] retailer

贖う[aganau] to compensate
贖罪[shokuzai] atonement
贖罪意識[shokuzaiishiki] a sense of atonement
贖罪の日[shokuzainohi] Yom Kippur

贖い[aganai] atonement
贖宥状[shokuyuujou] indulgence (religious)
贖宥[shokuyuu] indulgence (in the Catholic Church)