Similar word to optimization:

access, accession, accretion, accrual, accumulation, aggrandizement, augmentation, boost, breakthrough, burgeoning, cumulation, development, elaboration, enlargement, escalation, exaggeration, expansion, extension, gain, hike, incorporation, increment, inflation, intensification, maximization, merger, multiplication, optimization, raise, rise, spread, step-up, surge, swell, swelling, upgrade, upsurge, upturn, waxing