antecedency(n = noun.attribute) antecedence, anteriority, precedence, precedency, priority - preceding in time;
is a kind of earliness
Derived forms verb antecede₁, adjective antecedent₁

   The state or condition of being antecedent; priority. Fothherby. [1913 Webster]

N  precedence, coming before, the lead, le pas, superiority, importance, antecedence, antecedency, anteriority, precursor, priority, precession, anteposition, epacme, preference, preceding, precedent, antecedent, anterior, prior, before, former, foregoing, beforementioned, abovementioned, aforementioned, aforesaid, said, precursory, precursive, prevenient, preliminary, prefatory, introductory, prelusive, prelusory, proemial, preparatory, before, in advance, seniores priores, prior tempore prior jure.