Up and Uphill

Up adverb - Spatially or metaphorically from a lower to a higher position.

Uphill is a synonym for up in ascending topic. In some cases you can use "Uphill" instead the word "Up" as an adverb or an adjective or a preposition, when it comes to topics like moving from the earth.

Uphill adverb - Upward on a hill or incline.

Up is a synonym for uphill in ascending topic. You can use "Up" instead the word "Uphill" as an adjective or an adverb, if it concerns topics such as going up.