Z. izzard, zed.
zany, n. [jester], buffoon, [clown], harlequin, merry-an-drew.
zanyism, n. harlequinism, buffoonery, clownishness.
zeal, n. [fervor], [ardor], zealotry, intensity, [passion], [devotion], devotedness.
zealot, n. [enthusiast], [partisan], devotee, [fanatic].
zealous, a. [ardent], eager, [strenuous], [fervent], [passionate], [intense], devoted, impassioned.
zenith, n. culmination, [pinnacle], [acme], [summit], apex. Antonym: nadir.
zero, n. [cipher], [nothing], naught.
zest, n. relish, [flavor], [taste]; [enjoyment], relish, [gusto].
zinc, n. spelter.