The crossword solutions for the term BENZENE OR LEAD are TOXIN. Benzene and lead are both toxic substances that can have serious health effects if ingested or inhaled. Benzene is a colorless, flammable liquid that is used in the production of plastics, resins, and other chemicals. Lead is a heavy metal that is found naturally in the environment and can be found in paint, pipes, and other materials. Both benzene and lead can cause cancer, neurological damage, and other health problems.