Autism diagnostic interview-revised (ADI-R) is a standardized diagnostic tool used to diagnose autism spectrum disorders in children and adults. However, there are several synonyms for this term that may be more commonly used in certain settings or by certain professionals. These include Autism Diagnostic Observation Schedule (ADOS), Diagnostic and Statistical Manual of Mental Disorders (DSM), Childhood Autism Rating Scale (CARS), and Social Communication Questionnaire (SCQ). Each of these tools has its own unique strengths and limitations, and may be more appropriate for certain age ranges or developmental levels. Ultimately, the choice of diagnostic tool should be made in consultation with a qualified healthcare professional.