The term SEASHORE FEATURE can be broken down into two crossword solutions: DUNE (4 letters) and BREAKER (7 letters). A DUNE is a hill or ridge of sand formed by the wind, usually found along coasts and deserts. A BREAKER is a large wave that breaks into foam as it reaches the shore. Both dunes and breakers are common features of seashores, providing a unique landscape and habitat for many species of plants and animals.