Booster seats are an essential tool for parents to keep their young children safe while traveling in a car. If you are looking for synonyms for the word "booster seats," there are several options. Some of the most common phrases used in place of "booster seats" include "child seat," "car seat," "toddler seat," and "infant seat." These terms all refer to the same basic device that is designed to elevate a child's seating position in a car, providing added safety and comfort. Other synonyms for "booster seats" might include "high-back booster seat," "backless booster," or "belt-positioning booster seat." Whatever term you choose, the most important thing is to make sure that your child is protected and secure when traveling on the road.