- intergalactic medium
- intergalactic nebula
- intergalactic object
- intergalactic space
- intergalactic void
- Intergeneratioanl pattern
- inter-generational and intra-generational mobility
- intergenerational closure
- intergenerational equity
- inter-generational ethic
- inter generational gap
- intergenerational support
- Intergenerational Ｃonflict
- intergenic suppression
- interglacial
- interglacial period
- interglaciation
- Inter-govermental Maritime Consultative Organization
- Intergovernmental Authority on Development
- Intergovernmental Committee for Physical Education and Sport
- Intergovernmental E-government
- intergovernmentalism
- intergovernmental joint meetings
- Intergovernmental Organization
- Intergovernmental Panel on Climate Change