The word "uphill" is correct and usable in written English.
It is an adverb or adjective used to describe something that is difficult or that requires a lot of effort. Example sentence: She faced an uphill battle as she attempted to persuade her boss to accept her idea.
Thinking they are heading uphill they accelerate – only to discover they are speeding along faster than intended.
Jim Murphy is facing an uphill struggle to win potentially crucial leftwing support for his campaign to become Labour's leader in Scotland after the country's two biggest unions refused to back his candidacy.
Obada faces an uphill struggle to make the Cowboys.
But business investment growth is again going to come in weaker than expected, making the path to better balanced growth an uphill one.
It would be an uphill battle, whereas in Ghana the sky was the limit.
A spokesman for McGowan's campaign told Guardian Australia: "It will be very close, but it's an uphill battle for Sophie now.
"The small, private, tuition-dependent nonprofit institutions face an uphill battle in many places," said Andrew P Kelly, director of the Center on Higher Education Reform at the American Enterprise Institute.
Clegg is under pressure to persuade his MPs to remain united at tonight's meeting, though he faces an uphill task after it emerged that two junior ministers — the transport minister, Norman Baker, and the equalities minister, Lynne Featherstone — are considering whether to abstain or vote against, a move that might require them to resign from the government.
The notoriety of Channel 4's documentary Benefits Street has left the show's producers facing an uphill task trying to persuade people to take part in a second series as well as a spin-off programme about immigration.
Which is what makes spring 2016 so important, because while likely to be still early in the slow uphill march of rates, that's the point identified by economist Matthew Whittaker as being "crunch time" for Britain's indebted households.
Florida senator Marco Rubio was grilled on his support for immigration reform on Friday, at a conference for conservative activists that underlined the uphill battle he will face if he runs for the Republican nomination for president in 2016.
