Same word as vicarial:

acting, additional, alternate, another, artificial, backup, counterfeit, dummy, ersatz, experimental, false, imitation, makeshift, mock, near, other, provisional, proxy, pseudo, replacement, representative, reserve, second, sham, simulated, spurious, stopgap, substitutive, supplemental, supplementary, supposititious, surrogate, symbolic, temporary, tentative, vicarial, vicarious