There are several synonyms for the phrase "getting slower." These include decelerating, slowing down, easing up, losing speed, and crawling. Decelerating refers to a gradual decrease in speed. Slowing down and easing up refer to a more gradual decrease in pace. Losing speed refers to a decline in velocity. Crawling refers to a very slow speed, often used metaphorically to describe things moving at a snail's pace. These synonyms are useful for describing a variety of situations, such as traffic, physical movement, or even mental processes that are becoming slower. Whatever the context, these words can help to convey a sense of reduced speed.