Equipollency :: Equipollency (n.) Equality of power, force, signification, or application..
Equipollency :: Equipollency (n.) Sameness of signification of two or more propositions which differ in language.
Equipollent :: Equipollent (a.) Having equal power or force; equivalent.
Equipollent :: Equipollent (a.) Having equivalent signification and reach; expressing the same thing, but differently..