Hmm use revision cards? There are websites where you can make your own and use them to remember or something, well that's if you just have to remember their definitions and in no particular order.
If you're learning an essay off by heart or a speech etc then to remember that I wrote it out paragraph by paragraph over and over and over. I would do like pages and pages just repeating the paragraphs until I remembered them. It took less than 9 days, but immediately after using it I just completely forgot it xD (however that was for GCSE but I guess the method of memorising would be the same just the words would be more difficult)