| Ipsation | masturbation |
| ipsativ | ipsative |
| -isation | -ization |
| Isatin | isatin |
| Satin | satin |
| Ionisation | ionization ionisation |
| Kassation | cassation abrogation quashing reversal annulment military degradation |
| Sensation | sensation |
| -ation | -ation |
| Epilation | epilation |
| Himation | himation |
| Kreation | creation |
| Libation | libation |
| Novation | novation |
| Nunation | nunation |
| Oration | collect |
| Ablation | ablation amputation surgical incision surgical removal |
| Dotation | endowment |
| Imitation | imitation |
| Inflation | inflation |