THESAURUS
be off
beat it, begone, clear out, flake off, get, get going, get lost, get off, get out, git, go forth, hit the road, issue, issue forth, make yourself scarce, outset, outstart, put forth, sally, sally forth, scram, set forth, set forward, set off, set out, shove off, start, start off, start out, strike out, vamoose
ROGET THESAURUS
be off
Nonobservance
VB
fail, neglect, omit, elude, evade, give the go-by to, set aside, ignore, shut one's eyes to, close one's eyes to, infringe, transgress, violate, pirate, break, trample under foot, do violence to, drive a coach and six through, discard, protest, repudiate, fling to the winds, set at naught, nullify, declare null and void, cancel, retract, go back from,
be off, forfeit, go from one's word, palter, stretch a point, strain a point.
Departure
VB
depart, go away, take one's departure, set out, set off, march off, put off, start off,
be off, move off, get off, whip off, pack off, go off, take oneself off, start, issue, march out, debouch, go forth, sally forth, sally, set forward, be gone, hail from, leave a place, quit, vacate, evacuate, abandon, go off the stage, make one's exit, retire, withdraw, remove, vamoose, vamose, go one's way, go along, go from home, take flight, take wing, spring, fly, flit, wing one's flight, fly away, whip away, embark, go on board, go aboard, set sail' put to sea, go to sea, sail, take ship, hoist blue Peter, get under way, weigh anchor, strike tents, decamp, walk one's chalks, cut one's stick, take leave, say good bye, bid goodbye, disappear, abscond, entrain, inspan.