Yes, they can be used as growth measures. Because ADAM
look for instructional points for student across multiple sub-tests, they will adapt up or down regardless of a student's grade level. Therefore, when used as pre- and post-assessments, these tests compare the absolute instructional points. The difference between them is the growth.
Note that assessments designed around grade-level standards (such as grade-level benchmark tests) will bottom or max out. Thus, all students over a year below grade level will cluster as "low" scores within those measures.