Related to yesterday's lesson, here's a question that a student sent me last year:
Hi Simon, when you talk about Band 7+ vocabulary, you always talk about two or three words (a phrase basically). But I am trying to learn few "heavy" words like cardinal, multitudinous, prodigious, prestidigitation, peregrination etc. Can you please tell us what is more important for IELTS: "heavy words" or good phrases?
My answer to this question is simple: good phrases are much more important. The words listed by the student above would seem forced and unnatural, whereas good phrases show your ability to use words together like a native speaker would.
Please don't learn the "heavy" words mentioned by the student. Instead, focus on learning good collocations for IELTS topics.