The term 'GENIUS EINSTEIN' refers to the renowned physicist ALBERT Einstein (6 letters). He is widely regarded as one of the most influential scientists of the 20th century and is best known for his theory of relativity. His work in physics revolutionized scientific understanding of space, time, mass, energy, and gravity. He was awarded the Nobel Prize in Physics in 1921 for his discovery of the law of the photoelectric effect. Einstein's legacy continues to inspire generations of scientists and thinkers.