Example: [When he talks about the case, he sounds less like a zealous advocate than a political zealot]
Zeitgeist: The intellectual and moral tendencies that characterize any age or epoch.
Zenith: highest point summit
Example: [at the zenith of his achievement]
Zephyr: west wind gentle breeze
Example: [when these zephyrs blow, we enjoy sailing]
Zodiac: Imaginary belt encircling the heavens.
Zoologist: scientist who studies animals