tankage

• POS: Noun
• HYPHEN: tank=age

CIDE DICTIONARY

tankage, n. 

•  The act or process of putting or storing in tanks.  [Webster 1913 Suppl.]
•  Fees charged for storage in tanks.  [Webster 1913 Suppl.]
•  The capacity or contents of a tank or tanks.  [Webster 1913 Suppl.]
•  Waste matter from tanks; esp., the dried nitrogenous residue from tanks in which fat has been rendered, used as a fertilizer.  [Webster 1913 Suppl.]

OXFORD DICTIONARY

tankage, n.
1 a storage in tanks. b a charge made for this.
2 the cubic content of a tank.
3 a kind of fertilizer obtained from refuse bones etc.