I love that Free Rice site. It's very addicting, but it sucks not being able to get past a certain level. Anyway I'm able to select the right word if I know the Latin or Greek roots too. Back when I was really into dinosaurs I learned a lot of Latin and Greek terms, so that helps. Also sometimes I remember the word from a book I've read, or I think of the word within the context of a sentence and I can usually figure it out.