Zeal. Ardor, eagerness, earnestness, fervor, enthusiasm, energy, feeling, devotion, intensity, passion, spirit.
Ant. Apathy, indifference, coldness, carelessness, sluggishness, torpor.
Zealot. Partisan, bigot, enthusiast, fanatic, devotee, visionary, dreamer.
Ant. Renegade, traitor, deserter; lukewarm person.
Zealous. Ardent, anxious, earnest, enthusiastic, fervid, eager, steadfast, keen, fervent, devoted, prompt, ready, fiery, passionate.
Ant. Lukewarm, indifferent, cold, apathetic, passionless, phlegmatic.
Zenith. Height, pinnacle, acme, summit, culmination, maximum, apex, top.
Ant. Nadir, lowest point, depth, minimum.
Zephyr. West wind, breeze, gentle wind.
Ant. Gale, furious wind.