The word "planlessly" refers to doing something haphazardly and without any proper plan. Some synonyms for this word are aimlessly, randomly, thoughtlessly, carelessly, recklessly, chaotically, and blindly. These words imply a lack of direction, purpose, or method in executing a certain task. Using any of these synonyms will convey the same meaning as "planlessly." It is essential to have a clear and concise plan when undertaking any task for efficiency and effectiveness. Using these synonyms, it is clear that not having a plan will lead to results that are inadequate, disorganized and potentially disastrous.