As nouns the difference between uphill and uphiller
is that uphill is an uphill route while uphiller is a person traveling uphill.
As an adverb uphill
is up a slope, towards higher ground.
As an adjective uphill
is located up a slope or on a hill.
uphill
English
Adverb
(
en adverb)
up a slope, towards higher ground
(by extension) with difficulty
Antonyms
* downhill
Adjective
(further)
located up a slope or on a hill
going up a slope or a hill
(by extension) difficult or laborious
Usage notes
* Sense 3 comparative and superlative is usually made with more and most
Antonyms
* downhill