The term water-nymph refers to four different mythical creatures: UNDINE (6 letters), Lepto (5 letters), NEREID (6 letters), and NAIAD (5 letters). Undines are water spirits that are said to inhabit the water of rivers, lakes, and fountains. Leptos are lesser water nymphs that are associated with springs and streams. Nereids are sea nymphs that live in the Mediterranean Sea and are associated with Poseidon, the god of the sea. Finally, Naiads are nymphs that inhabit freshwater bodies such as lakes, ponds, and rivers.