11-Letter Words Containing: P,E,N,N,A,E

• analgesic drug (trade name Talwin) that is less addictive than morphine

• a small flat triangular bone in front of the knee that protects the knee joint

• shoot in the kneecap, often done by terrorist groups as a warning

• not explained

• having the reason or cause not made clear

• a son of your niece or nephew

• a defect in brain development resulting in small or missing brain hemispheres

• of or involving exponents

• a function in which an independent variable appears as an exponent

• an endorphin having opiate qualities that occurs in the brain and spinal cord and elsewhere

• a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs

• a site where people on holiday can pitch a tent

• temporary living quarters specially built by the army for soldiers

• the act of encamping and living in tents in a camp