Letter "Z"

Zany
adj. crazy, funny, silly, nonsensical, wacky
Zeal
n. enthusiasm, fervor, passion, spirit, ardor
Zealot
n. fanatic, devotee, partisan
Zealous
adj. enthusiastic, eager, fervent, passionate, spirited, ardent, earnest
Zenith
n. top, peak, crest, elevation
Zephyr
n. breeze, draft, wind
Zest
n. relish, enthusiasm, gusto, enjoyment, delight