When you hear the phrase "long haul," you might think of something that takes a lot of time and effort to complete. Luckily, there are many synonyms to describe this type of task or journey. These include "marathon," "endurance," "perseverance," "slog," "grind," and "mission." These words all suggest a sustained effort over a significant period of time. Other synonyms that may come to mind include "protracted," "extended," and "lengthy." These words describe a situation that takes a long time to resolve or complete. No matter which synonym you choose, they all convey the same idea: a difficult and prolonged task that requires patience, effort, and determination.