ROGET THESAURUS
come before
Precedence
VB
precede,
come before, come first, head, lead, take the lead, lead the way, lead the dance, be in the vanguard, introduce, usher in, have the pas, set the fashion, open the ball, take precedence, have precedence, have the start, place before, prefix, premise, prelude, preface.
Priority
VB
precede,
come before, forerun, go before, preexist, dawn, presage, herald, usher in, be beforehand, steal a march upon, anticipate, forestall, have the start, gain the start.