Slowup is a term used to describe a deceleration or decrease in pace. Synonyms for this word include slowdown, deceleration, hindrance, delay, and impediment. A slowdown refers to a reduction in speed, while a deceleration means a decrease in acceleration over time. Hindrance refers to anything that slows down progress or movement, while delay refers to a postponement or interruption in progress. Impediment is a term that describes anything that hinders or obstructs progress in general. Each of these synonyms can be used to describe a state of slowness or lack of progress, and can be used interchangeably in many contexts.