Synonyms for Till (same or very similar meaning)
WordNet sense 1 (unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together):
boulder clayWordNet sense 2 (a treasury for government funds):
trough, public treasuryWordNet sense 3 (a strongbox for holding cash):
cashbox, money boxFrom the ODE community, based on WordNetadd/edit