(n.) The act or process of intensifying, or of making more intense.

accelerando acceleration aggravation amplification annoyance augmentation beefing-up blowing up blowup concentration condensation consolidation contentiousness deepening deliberate aggravation deterioration embittering embitterment enhancement enlargement exacerbation exaggeration exasperation explosion heating-up heightening increase information explosion irritation magnification pickup population explosion provocation redoubling reinforcement sharpening souring speedup step-up strengthening tightening worsening