 | |
| |
| UK | US |
| behaviour | behavior |
| centre | center |
| colour | color |
| defence | defense |
| favour | favor |
| flavour | flavor |
| foetus | fetus |
| grey | gray |
| harbour | harbor |
| honour | honor |
| humour | humor |
| judgement | judgment |
| Metor | Meteor |
| neighbour | neighbor |
| oestrogen | estrogen |
| plough | plow |
| practise | practice |
| savour | savor |
| smoulder | smolder |
| sulphur | sulfur |
| vigour | vigor |
