10-Letter Words with H,A,R,D,B,A

• hazard to humans or the environment resulting from biological agents or conditions

• any bacterium or virus or toxin that could be used in biological warfare

• sheet of slate; for writing with chalk

• a backhanded blow

• a board that has a groove cut into one edge and a tongue cut into the other so they fit tightly together (as in a floor)

• telephone central where circuits are completed with patchcords

• a rectangular frame with handles at both ends; carried by two people

• device consisting of a corrugated surface to scrub clothes on

• protective covering consisting of a broad plank along a gunwale to keep water from splashing over the side

• boarding place along the top of a dam to increase its height

• having widely spreading paired branches

• having arms or armlike appendages

• swing from one hold to the next

• trivial nonsense