watershed Synonyms

water divide point of no return dividing line borderline river basin drainage basin drainage area catchment basin catchment area crossroads critical point water parting breakthrough drainage divide gathering ground area from which water drains water collection landmarks divides waypost tipping point game changer defining moment turning point swimming pool washbowl head event divide crunch crossroad crisis crises catchment boundary bay lagoon landmark turn seminal pool pivotal pan monument momentous milestone milepost marker basin