| deputy(replacement, alternative, alternate, backup, surrogate) |
| directly proportional |
| doppelganger(noun, like, copy, equal, tally) |
| dummy(supply, agent, replacement, alternative, alternate) |
| equable(adjective, calm, smooth, flat, plain) |
| equalized(level, fair, exact, equal, even) |
| equitable(fair, equal, balanced, impartial, proportional) |
| equivalence |
| fill-in(substitute, replacement, alternative, alternate, backup) |
| harmonious |
| in accord(expression, adjective, equal, adequate, proportionate) |
| in rapport(expression, adjective, interchangeable, proportionate, homologous) |
| kin(noun, adjective, match, equal, consistent) |
| kindred(adjective, like, even, parallel, consistent) |
| locum tenens(expression, supply, agent, replacement, alternate) |
| makeshift(supply, agent, replacement, alternative, alternate) |
| matched(adjective, calm, smooth, like, flat) |
| model(noun, adjective, form, appearance, figure) |
| of a piece(expression, idiom, adverb) |
| opposite(noun, adjective, like, copy, equal) |