Words To Use On The SAT.?

Remember that the people reading your essay may or may not know these big words, and they may or may not believe you know what these words even mean, especially if you use it in the wrong context. By all means if you can find college level words to use then go for it, but don't litter your paper with big words because you think it makes your essay look good. Use a decent combination of both, even if the word to you seems a bit "high schoolish".