| Name | Issues/Designs | |||
| |
white tern | — | — | d - white tern (2005) 2005 syns. Gygis alba |
| white-headed stilt | — | — | syns. Himantopus leucocephalus | |
| |
white-tailed tropicbird | — | — | syns. Phaethon lepturus, Phaeton flavirostris, Phaeton lepturus, White-tailed Tropic Bird, Yellow-billed tropic bird, yellow-billed tropicbird |
| |
whitecheek surgeonfish | — | — | syns. Acanthurus glaucopareius, Acanthurus glaucoparelus |
| |
whitetip reef shark | — | — | syns. Triaenodon obesus |
| |
windsurfing | — | — | d - windsurfing 1995 |
| |
woman | — | — | syns. women |
| World Stamp Championship 2004 | 2002 | — | - ... | |
| World Stamp Expo '89 | 1989 | — | - ... syns. World Stamp Expo 89 | |
| World Stamp Show New York 2016 | 2016 | — | - ... | |
| World War II start | 1939 | — | - 60th Anniversary of ... syns. Beginning of World War II, start of World War II | |
| WWF | 1961 | — | founding | |
| |
Xanthio crab | — | — | d - Xanthio crab & map of Arorae 1985 |
| |
Zoe | — | — | d - Zoe painting 2000 |