Wan
(adj) sickly pale
Waver
(v) to fluctuate between choices
Whimsical
(adj) lightly acting in a fanciful or capricious manner; unpredictable
Wily
(adj) clever; deceptive
Winsome
(adj) charming; happily engaging
Wizened
(adj) shriveled; withered; wrinkled
Wraith
(n) a ghost or specter; a ghost of a living person seen just before his or her death
Wanton
(adj) undisciplined; unrestrained; reckless
Xenophobia
(n) a fear or hatred of foreigners or strangers
Yoke
(v) to join together
Zealot
(n) someone passionately devoted to a cause
Zeal
(n) passion; excitement
Zenith
(n) the point of culmination; peak
Zephyr
(n) a gentle breeze; something airy or unsubstantial