speedup (n.)

• accelerando
• acceleration
• aggravation
• blowup
• concentration
• condensation
• consolidation
• deepening
• drive
• enhancement
• exacerbation
• exaggeration
• explosion
• getaway
• impetus
• intensification
• magnification
• pickup
• quickening
• reinforcement
• step-up
• strengthening
• thrust
• tightening