15-Letter Words Containing: C,E,H,I,S,T,T,U

• a junction between two dissimilar metals across which a voltage appears

• former genus of primitive apelike men now Homo erectus

• not wise in the ways of the world

• lacking complexity

• awkwardly simple and provincial

• excessive nutrients in a lake or other body of water, usually caused by runoff of nutrients (animal waste, fertilizers, sewage) from the land, which causes a dense growth of plant life; the decomposition of the plants depletes the supply of oxygen, leading to the death of animal life

• a mark on an article of trade to indicate its origin and authenticity

• validating the authenticity of something or someone