Accordance, Affinity, Agent, Agreement, Alignment, Allegory, Alliance, Alternate, Alternative, Ambiguity, Aping, Approach, Approximation, Assimilation, Backup, Balancing, Change, Changeling, Closeness, Community, Comparability, Compare, Comparing, Comparison, Concurrence, Conformity, Confrontation, Contrast, Copy, Copying, Correlation, Correspondence, Counterfeit, Deputy, Distinction, Distinctiveness, Double, Dummy, Equal, Equivalent, Equivocation, Ersatz, Exchange, Fake, Ghost, Identity, Imitation, Likeness, Likening, Makeshift, Matching, Metaphor, Metonymy, Mimicking, Nearness, Opposing, Opposition, Parallelism, Parity, Personnel, Phony, Proportion, Proxy, Relation, Relief, Replacement, Representative, Resemblance, Reserves, Ringer, Sameness, Secondary, Semblance, Sign, Similarity, Simile, Similitude, Simulation, Spares, Sub, Substitute, Substitution, Surrogate, Symbol, Token, Understudy, Vicar, Weighing