*equipollent*

a. [ L. aequipollens; aequus equal + pollens, -entis, p. pr. of pollere to be strong, able: cf. F. équipollent. ] 1. Having equal power or force; equivalent. Bacon. [ 1913 Webster ]

2. (Logic) Having equivalent signification and reach; expressing the same thing, but differently. [ 1913 Webster ]