The term 'bed border' can be solved by the word 'EDGING, ' which is a six-letter word. EDGING is a type of landscaping that involves creating a border or edge around a bed of plants, trees, or shrubs. It is often used to define the boundaries of a garden or lawn and can be done with a variety of materials, such as stones, bricks, or wood. EDGING can also be used to create a neat and tidy look in a garden or yard.