pursue, track, chase, trail, shadow, tail, accompany, attend, adhere, obey, observe, comply, conform, succeed, ensue, result, stem, spring, derive, flow, proceed, come after, go after, keep up with, s... [more]
backup - substitute - replacement - spare - alternative - fallback - stand-in - - auxiliary - extra - surplus - stock - store - supply - hoard - cache - fund - pool - reservoir - inventory - provision - resource - set-aside - emergency - standby - second-string - secondary - supplementary - additional - retained - saved - kept - preserved - conserved - held - booked - scheduled - arranged - earmarked - designated