“The Academic Word List” - useful academic vocabulary is contained in the Academic Word List, which is divided into 10 sub-lists in order of frequency, i.e. sub-list 1 has the most frequent academic words
13) http://www.oceansiderevolution.com/verbage/
Some VERB / NOUN combinations sound better than others; some NOUN / VERB combinations sound better than others; a good vocabulary may not make you smarter,
but it will make you sound smarter!
14) http://www.oocities.org/Athens/Aegean/6720
Tons of idiomatic expressions and their meanings
15) http://a4esl.org/q/h/vocabulary.htm
Vocabulary quizzes, ranging from easy to difficult - including spelling questions