ACCLIVITY
ascent, acclivity, rise, raise, climb, upgrade
(noun) an upward slope or grade (as in a road); “the car couldn’t make it up the rise”
Source: WordNet® 3.1
Etymology
Noun
acclivity (plural acclivities)
(geomorphology) A slope or inclination of the earth, as the side of a hill, considered as ascending, in opposition to declivity, or descending; an upward slope; ascent.
Source: Wiktionary
Ac*cliv"i*ty, n.; pl. Acclivities. Etym: [L. acclivitas, fr.
acclivis, acclivus, ascending; ad + clivus a hill, slope, fr. root
kli to lean. See Lean.]
Definition: A slope or inclination of the earth, as the side of a hill,
considered as ascending, in opposition to declivity, or descending;
an upward slope; ascent.
Source: Webster’s Unabridged Dictionary 1913 Edition