As nouns the difference between ness and nems
is that
ness is a promontory; a cape or headland.
frequently used as a suffix in placenamesnems is the ichneumon, or Egyptian mongoose.
As a proper noun Ness
is an Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa.
As an acronym NEMS is
acronym of lang=en|nanoelectromechanical systems.