The crossword solution for the term 'Tesla Competitor' is Edison, which is a six-letter word. Thomas Edison was an American inventor and businessman who is best known for his contributions to the development of electricity. He founded the Edison Electric Light Company in 1878, which was one of the first companies to develop and market electric lighting systems. Edison was a major competitor of Nikola Tesla, who was a Serbian-American inventor and engineer. Tesla developed the alternating current (AC) electrical system, which was a major advancement in the field of electricity. Edison and Tesla were fierce competitors in the development of electricity, and their rivalry has become legendary.