Encyclopedias, Almanacs, Transcripts, and Maps
- Woodcreepers (Dendrocolaptidae)
- Woodhoopoes (Phoeniculidae)
- woodlouse
- Woodpeckers, Wrynecks, and Piculets (Picidae)
- Woodsnakes and Spinejaw Snakes (Tropidophiidae)
- Woodswallows (Artamidae)
- Woodwell, George Masters (1928 – ) American Ecologist
- woodworm
- World Athletics Championship venues
- World Conservation Strategy
- world population
- World Religions
- World Resources Institute
- World Service
- world tourism
- World Trade Organization (WTO)
- World's Parliament of Religions
- Worldwatch Institute
- Wormlizards (Amphisbaenidae)
- Worship and Devotional Life