The term 'ACT ALTERNATE' is a combination of two acronyms. The first acronym, ACT, stands for American College Testing and is a standardized test used for college admissions in the United States. The second acronym, ALTERNATE, stands for an alternative version of the SAT, which is another standardized test used for college admissions in the United States. The crossword solution for this term is SAT, which is the three-letter acronym for the Scholastic Aptitude Test.