| No. | Item | Definition |
|---|---|---|
| 1. | absence | the state of being missing |
| 2. | abyss | a vast, deep separation |
| 3. | aperture | an opening, especially a hole |
| 4. | asymmetry | a lack of symmetry |
| 5. | blank | an empty space to fill |
| 6. | border | a dividing edge or boundary |
| 7. | boundary | a dividing line or limit |
| 8. | breach | a break in a barrier |
| 9. | break | a pause or interruption |
| 10. | breathing room | space to operate comfortably |
| 11. | buffer | a protective or extra space |
| 12. | cavity | a hollow space inside |
| 13. | chasm | a deep, wide separation |
| 14. | clearance | space needed to avoid contact |
| 15. | cleft | a split or opening |
| 16. | crack | a narrow split or opening |
| 17. | cushion | a reserve providing extra room |
| 18. | cut | an opening made by slicing |
| 19. | deficit | a shortage or lack |
| 20. | difference | a lack of sameness |
| 21. | disconnect | a lack of connection |
| 22. | discontinuity | a break in continuity |
| 23. | disparity | a noticeable difference or imbalance |
| 24. | distance | space between two points |
| 25. | divide | a separating line or difference |
| 26. | division | a separation into parts |
| 27. | edge | the boundary of something |
| 28. | elbow room | enough space to move |
| 29. | emptiness | the state of being empty |
| 30. | fault | a crack or fracture line |
| 31. | fissure | a long, narrow split |
| 32. | flaw | a defect or weak point |
| 33. | fracture | a break or crack |
| 34. | gaping hole | a large empty opening |
| 35. | gash | a long deep cut or opening |
| 36. | gulf | a wide difference or separation |
| 37. | headroom | extra capacity or space |
| 38. | hiatus | a break in continuity |
| 39. | hole | an empty spot or cavity |
| 40. | hollow | an empty space within |
| 41. | in-between | the space or time between |
| 42. | incongruity | a lack of harmony or fit |
| 43. | indentation | a hollow or inward mark |
| 44. | interface | a boundary where systems meet |
| 45. | interruption | a break in an activity |
| 46. | interstice | a small space between things |
| 47. | interval | a period between events |
| 48. | lack | an absence of something |
| 49. | lag | a delay creating a time gap |
| 50. | lapse | a temporary failure or break |
| 51. | leeway | extra room to move or act |
| 52. | limit | a boundary or end point |
| 53. | loophole | an unintended opening in rules |
| 54. | margin | extra amount beyond the minimum |
| 55. | misalignment | a failure to line up |
| 56. | mismatch | a lack of fit or alignment |
| 57. | missing chunk | a sizable part missing |
| 58. | missing piece | something absent from a whole |
| 59. | missing section | a part that is absent |
| 60. | niche | a small recessed space |
| 61. | nick | a small cut or notch |
| 62. | no-man’s-land | space between opposing sides |
| 63. | notch | a small cut or indentation |
| 64. | nothingness | complete absence of anything |
| 65. | null | a lack; nothing present |
| 66. | omission | something left out |
| 67. | opening | a hole or unblocked entry |
| 68. | orifice | a natural or formed opening |
| 69. | pause | a temporary stop |
| 70. | perforation | a small hole through something |
| 71. | play | free movement due to looseness |
| 72. | a small enclosed empty space | |
| 73. | puncture | a small hole made by piercing |
| 74. | recess | a hollowed-out space |
| 75. | rent | a tear or split |
| 76. | rift | a split or division |
| 77. | rip | a tear creating a hole |
| 78. | room | space available for something |
| 79. | rupture | a break or split |
| 80. | schism | a split within a group |
| 81. | separation | a distance between things |
| 82. | shortfall | an amount less than needed |
| 83. | slack | extra room; not tight |
| 84. | slit | a long, narrow opening |
| 85. | slot | a narrow opening or space |
| 86. | space | an empty area between things |
| 87. | split | a division into parts |
| 88. | tear | a rip creating an opening |
| 89. | threshold | a point of entry or start |
| 90. | time-out | a short break in activity |
| 91. | transition | a changeover between states |
| 92. | vacancy | an unfilled position or space |
| 93. | vacant lot | an empty piece of land |
| 94. | vacant space | an empty available area |
| 95. | vacuum | an empty space without matter |
| 96. | variance | a difference from the norm |
| 97. | void | an empty or unfilled space |
| 98. | wait | a period of delay |
| 99. | weak spot | a vulnerable opening or flaw |
| 100. | wiggle room | flexibility or extra space |
