Start with the free synonyms practice test. It shows you what the questions look like and which words you do not know yet.
In a synonyms question you get one word and four options; you pick the option that means (almost) the same. The approach:
Worked example
Which word means the same as obsolete?
A. modern B. outdated C. obscure D. absolute
Answer B is correct: obsolete means outdated. A is the opposite, while C and D merely resemble the word in sound, the classic sound-alike distractors.
Next, train with the practice sets below. After each set you see your score and the words you missed, building your vocabulary where it matters.
Finish with the easy and difficult selections: easy to build confidence, difficult to prepare for the hardest words in the assessment.