Synonyms to escape hatch

alternative, additional, agent, alternate, alternate choice, analogy, another, attainable, backup, change, changeling, choice, comparison, contingency, copy, counterfeit, deputy, different, discretion, discretional, disjunctive, double, druthers, dummy, election, elective, equal, equivalent, ersatz, escape clause, exchange, exchangeable, fake, fill-in, ghost, ghostwriter, imitation, interchangeable, locum tenens, loophole, makeshift, metaphor, metonymy, mock, next best thing, option, optional, optionality, personnel, phony, pinch, pinch hitter, pleasure, possibility, possible choice, preference, pretext, provisional, proxy, relief, replacement, replacing, representative, reserve, reserves, ringer, saving clause, second string, secondary, selection, sign, spare, spares, stand-in, stopgap, sub, substituent, substitute, substitution, succedaneum, superseder, supplanter, surrogate, symbol, synecdoche, temporary, tentative, third string, token, understudy, utility, utility player, variant, vicar, vicarious, vice-president, vice-regent, volitional, voluntary, way of escape, way out, will and pleasure,