Up-hill can be interpreted as a literal walk up a hill with a friend or could refer to situations in life that require harder work to overcome
Up-hill could link to a purgatory hill where humans were born in deficit paying off Adam and Eve's sin so life is a struggle as we have to climb out of sin and it's never straightforward
Up-hill shows that there is peace in death as life is a long journey and its a struggle but the "inn" in God offering her a place of peace in death
"shall i meet other wayfarers" shows the loneliness and desire for companionship and links to the aftermath of Nora leaving as wayfarers are the other women, new woman
Up-hill is about a metaphorical journey to have peace with God
If its Up-hill for men too, how much more is it Up-hill for women?
Up-hill can link to Nora relying on the afterlife as she feels like she has wasted her life as a housewife
In Up-hill there is an attempt to overcome an obstacle