| No. | Item | Definition |
|---|---|---|
| 1. | adaptation | a modified version for use |
| 2. | alternate | serving in place of another |
| 3. | analogue | similar comparable thing |
| 4. | another | one more; a different one |
| 5. | approach | a way of dealing with something |
| 6. | arrangement | a particular way things are set |
| 7. | auxiliary | providing backup or support |
| 8. | avenue | a possible approach |
| 9. | backstop | supporting fallback choice |
| 10. | backup | a reserve choice |
| 11. | candidate | a possible choice |
| 12. | choice | something selected from possibilities |
| 13. | comparable | similar enough to replace |
| 14. | configuration | a particular arrangement of parts |
| 15. | contender | a competing possible choice |
| 16. | contingency | backup possibility for problems |
| 17. | conversion | a change to another form |
| 18. | counterpart | a corresponding substitute or match |
| 19. | course | a path of action |
| 20. | cover | temporary replacement |
| 21. | departure | deviation from the usual |
| 22. | design | a planned form or arrangement |
| 23. | detour | roundabout alternate route |
| 24. | deviation | different course or form |
| 25. | different | not the same |
| 26. | elective | chosen rather than required |
| 27. | equivalent | equal in value or function |
| 28. | exchange | one thing for another |
| 29. | extra | more than the main one |
| 30. | fallback | something used if needed |
| 31. | fill-in | temporary substitute |
| 32. | form | a particular type or shape |
| 33. | format | the arrangement or form |
| 34. | fresh choice | a newly considered option |
| 35. | further option | an additional possible choice |
| 36. | go-to backup | a reliable second option |
| 37. | in lieu | in place of |
| 38. | in reserve | kept available for use |
| 39. | instead | in place of something else |
| 40. | interchange | something used in place of another |
| 41. | interchangeable | able to be swapped |
| 42. | less preferred | not the first choice |
| 43. | make-do | usable as a temporary substitute |
| 44. | means | a method or way |
| 45. | measure | a practical course of action |
| 46. | method | a way of doing something |
| 47. | model | a particular version or design |
| 48. | move | a chosen course of action |
| 49. | new tack | fresh approach |
| 50. | nominee | a proposed choice |
| 51. | offshoot | branching variation |
| 52. | opening | an available opportunity or choice |
| 53. | option | a possible choice |
| 54. | optional | not required; available instead |
| 55. | other | different from the one mentioned |
| 56. | parallel | comparable counterpart |
| 57. | path | a way forward |
| 58. | pick | the chosen option |
| 59. | plan B | a fallback option |
| 60. | possibility | a potential option |
| 61. | preference | the option liked better |
| 62. | proposal | a suggested option |
| 63. | prospect | a possible option or outcome |
| 64. | proxy | someone or something acting instead |
| 65. | recommendation | a suggested course or option |
| 66. | recourse | an available course of action |
| 67. | relief | person replacing another |
| 68. | replacement | something that takes another’s place |
| 69. | reserve | kept for use if needed |
| 70. | route | a possible course or path |
| 71. | second choice | the next preferred option |
| 72. | secondary | coming after the first |
| 73. | selection | a chosen option |
| 74. | setup | a particular arrangement or system |
| 75. | solution | a way to solve something |
| 76. | spare | kept as an extra |
| 77. | spin-off | derived variation |
| 78. | stand-in | a temporary replacement |
| 79. | standby | ready for use if needed |
| 80. | stopgap | a temporary substitute or fix |
| 81. | sub in | put in as a replacement |
| 82. | subordinate | lower in rank or importance |
| 83. | substitute | something used instead |
| 84. | substitution | the act of replacing |
| 85. | successive | following in order |
| 86. | successor | one coming after another |
| 87. | suggestion | an offered idea or option |
| 88. | surrogate | a substitute person or thing |
| 89. | swap | an exchange for another |
| 90. | switch | a change to another option |
| 91. | trade-off | an exchanged advantage or choice |
| 92. | understudy | a person ready to replace another |
| 93. | usable stand-in | something suitable in place |
| 94. | utility option | a practical fallback choice |
| 95. | variant | a different form or version |
| 96. | version | a particular form of something |
| 97. | viable substitute | a substitute that can work |
| 98. | way out | an alternative solution |
| 99. | workable substitute | a substitute that can function |
| 100. | workaround | an indirect practical solution |
