kupam
kūpam — a well; SB 3.31.40
andha-kūpam — which is nothing but a blind well (where there is no water but one nonetheless searches for water); SB 7.5.5
trita-kūpam sudarśanam — the pilgrimage places known as Tritakūpa and Sudarśana; SB 10.78.19-20