The Collaborative International Dictionary of English v.0.48:

Outrank \Out*rank"\, v. t.
   To exceed in rank; hence, to take precedence of.
   [1913 Webster]

WordNet (r) 3.0 (2006):

outrank
    v 1: take precedence or surpass others in rank [syn: rank,
         outrank]

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "outrank":
   antecede, come before, come first, front, go ahead of, go before,
   go in advance, have priority, head, head the table, head up,
   kick off, lead, lead off, play first fiddle, precede, rank,
   rank first, rank out, rate, stand first, star, take precedence,
   usher in