deepening (n.)
- accelerando
 - acceleration
 - aggravation
 - amplification
 - annoyance
 - augmentation
 - blowup
 - concentration
 - condensation
 - consolidation
 - contentiousness
 - depression
 - deterioration
 - digging
 - drilling
 - embitterment
 - enhancement
 - enlargement
 - exacerbation
 - exaggeration
 - exasperation
 - excavation
 - explosion
 - increase
 - intensification
 - irritation
 - lowering
 - magnification
 - mining
 - pickup
 - provocation
 - reinforcement
 - sinking
 - souring
 - speedup
 - step-up
 - strengthening
 - tightening
 - worsening
 
deepening (adj.)
- accelerando
 - heightening
 - lowering
 - mining
 - probing
 - worsening