uphill Synonyms

acclivitous rising tricky tough toilsome tiring taxing strenuous stiff slope skyward severe scansorial scandent rugged rigorous troublesome up no picnic effortful back-breaking oka gruelling grueling backbreaking wearying wearisome verticalness upwards upward upstream uprising upclimb punishing palestric difficile demanding climbing choline challenging burdensome ascensive ascensional ascension ascending arduous antrorse anabatic aloft difficult