1. get down, begin, get, start out, start, set about, set out, commence
usage: take the first step or steps in carrying out an action; "We began working at dawn"; "Who will start?"; "Get working as soon as the sun rises!"; "The first tourists began to arrive in Cambodia"; "He began early in the day"; "Let's get down to work now"
2. depart, part, start, start out, set forth, set off, set out, take off, leave, go forth, go away