The term 'embark' is used to describe the act of beginning a journey or undertaking a task. INAUGURATE (10 letters) is to formally introduce or BEGIN something, such as a new project or policy. ENLIST (6 letters) is to join the military or a cause. LAUNCH (6 letters) is to set something in motion, such as a boat or a rocket. COMMENCE (8 letters) is to START or initiate something. START (5 letters) is to BEGIN an activity or process. ENTER (5 letters) is to go into or take part in something. BEGIN (5 letters) is to START something. OPEN (4 letters) is to START or initiate something. DEPART (6 letters) is to leave a place. UNDERTAKE (9 letters) is to accept responsibility for something. BOARD (5 letters) is to get on a vehicle or vessel. SAIL (4 letters) is to travel by boat. Setout (6 letters) is to BEGIN a journey. Startout (8 letters) is to BEGIN a journey or task. All of these words can be used to describe the act of embarking on a journey or task.