- W ... Wade, Arthur Sarsfield
- Wade, Benjamin F. ... Wagner, Robert Ferdinand
- Wagner, Robert Ferdinand, Jr. ... Wailing Wall
- Wailly, Charles de ... Wakefield, Battle of
- Wakefield cycle ... Walentynowicz, Anna
- Wales ... Walker, Madam C. J.
- Walker, Maggie Lena Draper ... Wallace, Lila
- Wallace, Mike ... wallpaper
- Wallraf-Richartz Museum ... Walther, Johannes
- Walther von der Vogelweide ... Wang Banshan
- Wang Bi ... Wani
- Waning of the Middle Ages, The ... War of Time
- War on Poverty ... wardship
- wardum ... Warner, Susan Bogert
- Warner, Susan Bogert; and Warner, Anna Bartlett ... Warsaw Treaty Organization
- Warsaw Uprising ... Washington Agricultural College
- Washington and Jefferson College ... Wasserfall
- “Wasserfälle von Slunj, Die” ... water burial
- water cabbage ... Water Resources Development Act
- water retting ... Waterland
- waterleaf ... Watson, Thomas John, Sr.
- Watson, Thomas Sturges ... wave shifter
- wave soaring ... Wayiqraʾ
- Wayland the Smith ... Wealden
- Wealden Series ... Webb, Clifton
- Webb, Harry Roger ... Weddigen, Otto
- wedding ... Wei dynasty
- Wei Gaozu ... Weiner, Leó
- Weiner, Matthew ... Weizsäcker, Carl Friedrich, Freiherr von
- weka ... wellington
- Wellington ... Welwyn Hatfield
- Wembley ... Wentworth, Sir Thomas
- Wentworth, W. C. ... Wesleyan Church
- Wesleyan Methodist Church ... West Greek
- West Greenland Current ... West Sussex
- West Syrian Church ... Western Electric Company Inc.
- Western Engineer ... Western sculpture
- Western Shield ... Westminster, Treaties of
- Westmore, Ern ... Wetu Lima
- Wetu Telu ... What Is Oblomovism
- What Is Property? ... Wheeler, Simon
- Wheeler, Sir Mortimer ... whip-poor-will
- whip-tailed ray ... White, Andrew Dickson
- White Angel Breadline ... white glue
- “White Goddess; A Historical Grammar of Poetic Myth, The” ... white noise
- white noise ... White Stripes
- white sturgeon ... white-tailed skimmer
- white-throated capuchin ... Whitman, Narcissa
- Whitman, Ottis Dewey, Jr. ... Whorf, Benjamin Lee
- Whorfian hypothesis ... Widdringtonia juniperoides
- Widdringtonia schwarzii ... Wiener schnitzel
- Wiener Sezession ... Wilbrord, Saint
- Wilbur, Earl Morse ... wild sweet crab
- Wild, the Innocent & the E Street Shuffle, The ... Wilhelm zu Wied
- Wilhelmina ... Willems, Jan Frans
- Willems, Paul ... William, Warren
- William X ... Williams, Sir Bernard
- Williams, Sir Bernard Arthur Owen ... willow family
- willow grouse ... Wilson, Jack
- Wilson, Jackie ... Winchcombe
- Winchel, Walter ... Windischgrätz, Alfred, Fürst zu
- Windischgrätz, Alfred, Fürst zu ... wingback
- wingback formation ... Winsor Castle
- Winsor, Justin ... Wintun
- Winwood, Sir Ralph ... Wiseman, Frederick
- Wiseman, Joseph ... Witheringia solanacea
- Witherings, Thomas ... WLAC
- Władysław I ... Wolf Creek Crater
- Wolf Cubs ... Wollomombi Falls
- Wollongong ... wombat
- women ... Wŏnhyo Taesa
- Woni ... Wood, William
- Wood, William ... Woodstock, Thomas of
- Woodstock, William Henry Cavendish Bentinck, Viscount ... Wooster
- Wooster, Bertie ... Workers and Soldiers Council
- Workers’ and Soldiers’ Deputies, Soviet of ... World Boxing Association
- World Boxing Council ... world order thinking
- World Plan Executive Council ... Worrell, Sir Frank Mortimer Maglinne
- Worringen, Battle of ... wreckfish
- Wrecking Ball ... Wright, Warren
- Wright Whirlwind ... Wu Ching-tzu
- Wu Daoxuan ... wulfenite
- Wulff, Joan Salvato ... Wyat, Sir Thomas, the Younger
- Wyatt, Bob ... Wyvill, Christopher