| No. | Item | Definition |
|---|---|---|
| 1. | abreast of | level with and beside |
| 2. | across | on the other side of |
| 3. | adverse | unfavorable or opposed |
| 4. | against | in opposition or contact with |
| 5. | alternate | serving as another choice |
| 6. | alternative | available as another option |
| 7. | antagonistic | actively opposed or hostile |
| 8. | anti | opposed to something |
| 9. | antipodal | diametrically opposed or contrary |
| 10. | antithesis | direct contrast or counterpart |
| 11. | antithetical | directly opposed in meaning |
| 12. | as opposed to | rather than; in contrast with |
| 13. | at odds with | in conflict with |
| 14. | at variance with | not agreeing with |
| 15. | athwart | across or contrary to |
| 16. | back | the rear side |
| 17. | backside | rear surface or side |
| 18. | backward | directed toward the rear |
| 19. | backwards | in reverse direction |
| 20. | balancing | offsetting another force |
| 21. | before | in front of |
| 22. | conflicting | clashing or incompatible |
| 23. | contradicting | denying or opposing |
| 24. | contradictory | mutually inconsistent or opposed |
| 25. | contrarian | opposing prevailing views |
| 26. | contrary | completely different or opposed |
| 27. | contrasting | clearly different in comparison |
| 28. | converse | reversed in relation or order |
| 29. | counter | against or contrary to |
| 30. | counteractive | working against an effect |
| 31. | counterpart | matching person or thing |
| 32. | countervailing | offsetting or opposing |
| 33. | crosswise | across rather than lengthwise |
| 34. | dead against | strongly opposed to |
| 35. | diametric | completely opposed |
| 36. | diametrical | wholly opposite in nature |
| 37. | different | not the same |
| 38. | disagreement | lack of agreement |
| 39. | dissimilar | not alike |
| 40. | divergence | difference or separation |
| 41. | dual | paired with a counterpart |
| 42. | enemy | hostile opponent |
| 43. | face-to-face | directly facing each other |
| 44. | facing side | side turned toward something |
| 45. | facing toward | turned in the direction of |
| 46. | far side | side across from here |
| 47. | farther side | more distant facing side |
| 48. | flip side | contrasting other aspect |
| 49. | flipside | contrasting other side |
| 50. | foil | contrasting counterpart |
| 51. | front | side facing forward |
| 52. | fronting | facing toward something |
| 53. | head-on | directly facing or confronting |
| 54. | hostile to | strongly against |
| 55. | in contrast to | unlike or compared against |
| 56. | in front of | directly before or facing |
| 57. | incompatibility | inability to agree or coexist |
| 58. | incompatible with | unable to coexist or agree |
| 59. | inconsistent with | not compatible with |
| 60. | inimical | hostile or harmful to |
| 61. | inverse | reversed in order or relation |
| 62. | inverted | turned upside down or reversed |
| 63. | juxtaposed | placed side by side for contrast |
| 64. | meet | face or confront |
| 65. | negative | opposed or denying |
| 66. | neutralizing | counteracting an effect |
| 67. | obverse | corresponding front side |
| 68. | offsetting | balancing or counteracting |
| 69. | on the other side | across from a position |
| 70. | opponent | one who opposes |
| 71. | opposed | against or in disagreement |
| 72. | opposing | set against or in conflict |
| 73. | opposition | resistance or opposing side |
| 74. | other | the remaining or alternative one |
| 75. | over against | directly across from |
| 76. | over the way | across the street or path |
| 77. | pitted against | matched in opposition to |
| 78. | polar | at an extreme contrast |
| 79. | polarity | state of opposing extremes |
| 80. | rearward | toward the back |
| 81. | reciprocal | corresponding in reverse relation |
| 82. | resistant to | opposed to accepting |
| 83. | resisting | opposing or withstanding |
| 84. | restraint | limiting or opposing control |
| 85. | retrograde | moving backward or reversed |
| 86. | reverse | the other way around |
| 87. | reversed | turned the other way |
| 88. | rival | competing opponent or equal |
| 89. | set against | placed in opposition to |
| 90. | thwarting | working against success |
| 91. | transverse | lying across something |
| 92. | underside | lower side of something |
| 93. | unfavorable | not supporting; adverse |
| 94. | unlike | different from something else |
| 95. | upside down | in an inverted position |
| 96. | variance | difference or disagreement |
| 97. | verso | left-hand or back page |
| 98. | versus | against or compared with |
| 99. | vis-à-vis | face-to-face with; compared with |
| 100. | vs. | against; versus |
