Synonyms for Fad:

n.

flavor of the month/week, a flash in the pan. the in thing, vogue, thing, usual, the latest thing, style, trend, the last word, mode, fashion. caprice (noun)
humor.
craze (noun)
eccentricity, custom, maggot, hobby, vogue, humor, rage, fashion, style, in-joke, prevailing taste, thing, vagary, the thing, trend, mania, kink, the latest thing, quirk, fancy, mode, novelty, the in thing, the last word, whim, passing fashion, whimsy, crotchet, sensation, caprice, frivolity, innovation, amusement, flash in the pan, the latest word, furor, cry, enthusiasm, freak, popular innovation, passing fancy, affectation, all the rage, the new look.
fad (noun)
cult, furor, rage, craze, furore.
fashion (noun)
vogue.

Other synonyms:

flash in the pan. enthusiasm. trend, fashion. style, mode. thing. avocation
hobby.
notion
vagary.
Other relevant words:
custom, cry, fancy, enthusiasm, flash in the pan, the in thing, prevailing taste, crotchet, amusement, maggot, caprice, the latest thing, thing, vagary, affectation, mode, eccentricity, fashion, sensation, novelty, trend, freak, whimsy, humor, innovation, quirk, whim, kink, the last word, passing fancy, style, mania, frivolity, hobby, vogue.

Usage examples for fad

  1. A great cry was raised against the fad by a number of leading writers. – Anarchism and Other Essays by Emma Goldman
  2. The poor hostess would have been distracted if she had not been one of those who love a new fad and try each one in turn. – Home Life in Germany by Mrs. Alfred Sidgwick
  3. It was just an " interesting fad of hers! – The Brightener by C. N. Williamson A. M. Williamson