River nymphs are mythical creatures that inhabit rivers, streams, and other bodies of water. The two crossword solutions for the term 'river nymphs' are Naiads (6 letters) and Naiades (7 letters). Naiads are female water nymphs in Greek mythology who preside over fountains, wells, springs, and other bodies of fresh water. Naiades are similar to Naiads, but they are specifically associated with rivers.