A checkpoint is a crucial point that stops a person or thing from proceeding further. Synonyms for the word "checkpoint" include security station, border post, tollbooth, inspection point, roadblock, obstacle, and barricade. These words convey the idea of a physical stop point that is used to monitor movement and regulate access to a particular area. A checkpoint can be set up for various reasons like security, customs, or immigration. The term is often used in the context of military operations or public safety. While the word "checkpoint" is commonly used, its synonyms offer a varied range of vocabulary that can be used in different situations.