I’m currently preparing for the ACT. Is there any vocabulary pdf or book I can use just like prepare for the SAT?
This!
The ACT will not directly test you on vocabulary like the SAT does. Don’t bother trying to memorize words for the test. Reading may contain some questions bout vocabulary, but it always revolves around how it is used in context. It will never ask you to straight up define a word, only in context. To be honest, those are the easiest questions in my opinion. You can easily tell what the word means from the context.
Check the link at the bottom of this page:
http://blog.prepscholar.com/act-vocabulary-words-you-must-know
I found some PDF or the one @nw2this gave to me online, but I feel it is not that official like the BARRON 3500 for SAT, so there is NO such things for ACT~?
Search Amazon for ACT vocabulary books. There are some:
The best way to learn vocab for the ACT is to pick it up by reading advanced literature. Usually, if you have strong comprehension, then you can compensate for words you don’t know with context clues and basic knowledge of Latin and Greek roots. If you don’t have good comprehension, then memorizing vocab lists will not help very much, and you should focus on conceptual understanding first.