- isentropic efficiency
- isentropic efficiency of nozzles
- isentropic expansion refrigeration effect
- isentropic flow
- isentropic gas
- isentropic initial condition
- isentropic perturbation
- isentropic process
- isentropic stagnation parameters
- isentropy
- Ise Shrine
- Ise-wan
- ISF
- Isfahan
- Isfahan, Iran
- Ishak Haji Muhammad
- Ishango bone
- Ishaq ibn Hunain
- Ishaq Musa al-Husseini
- Ishidanjinwangjil
- Ishii Baku
- Ishii Maki
- Ishii Ryosuke
- Ishikari-heiya
- Ishikawa Jun