enhancement

ɪnˈhɑːnsm(ə)nt
ɛnˈhɑːnsm(ə)nt

noun

an increase or improvement in quality, value, or extent.

this programme of enhancements will improve the daily experience of passengers

improvement,intensification,magnification,amplification,increase,strengthening,inflation,augmenting,augmentation,boost,rise,increment,lift,escalation,elevation,exaltation,aggrandizement,swelling,heightening,emphasis,stress,reinforcement,enrichment,jacking up,hike