A-D is a common prefix in many words, and it can be challenging to remember all of them. Fortunately, there are a variety of synonyms that can be used. The most common synonyms for A-D include acro-, ad-, agro-, amphi-, ana-, ante-, anti-, apo-, arch-, auto-, and avant-. Each of these prefix synonyms has its own specific meaning and application. Acro-, for example, is used to indicate heights, while anti- suggests opposition or against. By learning and using these synonyms, you can expand your vocabulary and better understand the nuances of language.