upgrade - noun

an upward slope or grade (as in a road)

software that provides better performance than an earlier version did

a reservation that is improved

the property possessed by a slope or surface that rises

hardware that provides better performance than an earlier version did

the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components)

upgrade - verb

• rate higher; raise in value or esteem
• to improve what was old or outdated
• give a promotion to or assign to a higher position
• get better travel conditions
• give better travel conditions to

upgrade - thesaurus

acclivity   advance   ascent   climb   elevate   promote   raise   rise