Encyclopedias, Almanacs, Transcripts, and Maps
- Heroes
- Herons and Bitterns (Ardeidae)
- Herzegovina
- Hetch Hetchy Reservoir
- Heterodontiformes (Bullhead or Horn Sharks)
- Hevajra
- Hexactinellida (Glass Sponges)
- hexagon
- Hexanchiformes (Six- and Sevengill Sharks)
- Hierodouleia
- Hierophany
- Hieros Gamos
- High Court of Justice
- high-definition television
- High-Grading (Mining, Forestry)
- high-level language
- High-Level Radioactive Waste
- High-Solids Reactor
- highest mountains
- highest waterfalls