Thorndike is a surname that has several synonyms. Some alternatives are Thorne, Thorn, Thorndyke, Thornburg, Thornberry, and Thornley. All of these names share a common root related to thorny plants, symbolizing protection or defensiveness. The Thorndike family has a long and distinguished history, with notable members including the psychologist Edward Thorndike, who was instrumental in the development of behaviorism, and Sybil Thorndike, a famous British actress. The name has also been used in fiction, such as in the character of Professor Adam Thorndike in the novel "The Diamond of Darkhold". Overall, the name Thorndike signifies strength, resilience, and tenacity.