depletion (n.)

• ablation
• absorption
• assimilation
• attrition
• clearance
• clearing
• consumption
• corrosion
• curtailment
• cut
• cutting
• decrease
• decrement
• defecation
• depreciation
• derogation
• detraction
• digestion
• diminution
• dip
• disparagement
• dissipation
• dissolution
• drain
• drainage
• egress
• elimination
• emptying
• erosion
• evacuation
• evaporation
• excretion
• exhaustion
• expending
• expenditure
• extraction
• finishing
• impairment
• impoverishment
• ingestion
• leakage
• lessening
• loss
• reduction
• remission
• removal
• retraction
• retrenchment
• shortening
• shrinkage
• spending
• squandering
• truncation
• unloading
• using
• venting
• voidance
• voiding
• wastage
• waste
• wastefulness
• wearing