| No. | Item | Definition |
|---|---|---|
| 1. | aging | US spelling of ageing |
| 2. | airplane | US spelling of aeroplane |
| 3. | aluminum | US spelling of aluminium |
| 4. | analog | US spelling of analogue |
| 5. | analyze | US spelling of analyse |
| 6. | anemia | US spelling of anaemia |
| 7. | artifact | US spelling of artefact |
| 8. | ax | US spelling of axe |
| 9. | backward | US spelling of backwards |
| 10. | behavior | US spelling of behaviour |
| 11. | catalog | US spelling of catalogue |
| 12. | center | US spelling of centre |
| 13. | cesarean | US spelling of caesarean |
| 14. | check | US spelling of cheque |
| 15. | checkered | US spelling of chequered |
| 16. | color | US spelling of colour |
| 17. | cozy | US spelling of cosy |
| 18. | curb | US spelling of kerb |
| 19. | defense | US spelling of defence |
| 20. | dialog | US spelling of dialogue |
| 21. | diarrhea | US spelling of diarrhoea |
| 22. | distill | US spelling of distil |
| 23. | draft | US spelling of draught |
| 24. | edema | US spelling of oedema |
| 25. | encyclopedia | US spelling of encyclopaedia |
| 26. | endeavor | US spelling of endeavour |
| 27. | enroll | US spelling of enrol |
| 28. | esophagus | US spelling of oesophagus |
| 29. | esthetic | US spelling of aesthetic |
| 30. | favorite | US spelling of favourite |
| 31. | feces | US spelling of faeces |
| 32. | fiber | US spelling of fibre |
| 33. | forward | US spelling of forwards |
| 34. | fulfill | US spelling of fulfil |
| 35. | fulfillment | US spelling of fulfilment |
| 36. | glamor | US spelling of glamour |
| 37. | gray | US spelling of grey |
| 38. | gynecology | US spelling of gynaecology |
| 39. | harbor | US spelling of harbour |
| 40. | hemoglobin | US spelling of haemoglobin |
| 41. | honor | US spelling of honour |
| 42. | humor | US spelling of humour |
| 43. | inquire | US spelling of enquire |
| 44. | inquiry | US spelling of enquiry |
| 45. | installment | US spelling of instalment |
| 46. | instill | US spelling of instil |
| 47. | jewelry | US spelling of jewellery |
| 48. | judgment | US spelling of judgement |
| 49. | labor | US spelling of labour |
| 50. | leukemia | US spelling of leukaemia |
| 51. | license | US noun spelling of licence |
| 52. | likable | US spelling of likeable |
| 53. | livable | US spelling of liveable |
| 54. | lodgment | US spelling of lodgement |
| 55. | maneuver | US spelling of manoeuvre |
| 56. | marvelous | US spelling of marvellous |
| 57. | medieval | US spelling of mediaeval |
| 58. | meter | US spelling of metre |
| 59. | mold | US spelling of mould |
| 60. | movable | US spelling of moveable |
| 61. | mustache | US spelling of moustache |
| 62. | neighbor | US spelling of neighbour |
| 63. | odor | US spelling of odour |
| 64. | offense | US spelling of offence |
| 65. | omelet | US spelling of omelette |
| 66. | organize | US spelling of organise |
| 67. | orthopedic | US spelling of orthopaedic |
| 68. | pajamas | US spelling of pyjamas |
| 69. | parlor | US spelling of parlour |
| 70. | pediatric | US spelling of paediatric |
| 71. | phony | US spelling of phoney |
| 72. | plow | US spelling of plough |
| 73. | practice | US noun spelling of practise |
| 74. | pretense | US spelling of pretence |
| 75. | program | US spelling of programme |
| 76. | realize | US spelling of realise |
| 77. | rigor | US spelling of rigour |
| 78. | routing | US spelling over routeing |
| 79. | rumor | US spelling of rumour |
| 80. | saber | US spelling of sabre |
| 81. | saltpeter | US spelling of saltpetre |
| 82. | sepulcher | US spelling of sepulchre |
| 83. | skeptic | US spelling of sceptic |
| 84. | skeptical | US spelling of sceptical |
| 85. | skillful | US spelling of skilful |
| 86. | smolder | US spelling of smoulder |
| 87. | somber | US spelling of sombre |
| 88. | specter | US spelling of spectre |
| 89. | theater | US spelling of theatre |
| 90. | tire | US spelling of tyre |
| 91. | toward | US spelling of towards |
| 92. | traveler | US spelling of traveller |
| 93. | tumor | US spelling of tumour |
| 94. | usable | US preferred spelling form |
| 95. | valor | US spelling of valour |
| 96. | vigor | US spelling of vigour |
| 97. | while | US spelling of whilst |
| 98. | woolen | US spelling of woollen |
| 99. | worshiper | US spelling of worshipper |
| 100. | yogurt | US spelling of yoghurt |
