The term FOE OF SPIDER-MAN can be summarized by two crossword solutions: ELECTRO (7 letters) and GREENGOBLIN (11 letters). Electro is a fictional supervillain appearing in American comic books published by Marvel Comics. He is most often depicted as an enemy of Spider-Man, possessing the ability to control electricity. The Green Goblin is another fictional supervillain appearing in American comic books published by Marvel Comics. He is a frequent enemy of Spider-Man, and is known for his use of a variety of high-tech gadgets and weapons.