Princeton's WordNet

1. brassy, brasslike(adj)

   resembling the sound of a brass instrument

   Synonyms:
   insolent, flashy, trashy, meretricious, tacky, gimcrack, bald-faced, loud, bodacious, garish, brasslike, barefaced, cheap, brazen-faced, audacious, tawdry, flash, tatty, gaudy, brassy, brazen

   Antonyms:
   tasteful, ashamed(p)

2. brassy, cheap, flash, flashy, garish, gaudy, gimcrack, loud, meretricious, tacky, tatty, tawdry, trashy(adj)

   tastelessly showy

   Synonyms:
   forte, crummy, brazen, brazen-faced, chintzy, ratty, audacious, specious, loud, punk, shabby, flashy, meretricious, jazzy, cheapjack, bodacious, inexpensive, tinny, bum, cheap, sleazy, trashy, brassy, insolent, gaudy, garish, tatty, shoddy, sporty, cheesy, tawdry, brasslike, moth-eaten, bald-faced, barefaced, gimcrack, chinchy, flash, showy, tacky, gilded, rubbishy

   Antonyms:
   tasteful, ashamed(p)

3. audacious, barefaced, bodacious, bald-faced, brassy, brazen, brazen-faced, insolent(adj)

   unrestrained by convention or propriety

   Synonyms:
   brazen, brazen-faced, flip, meretricious, audacious, gimcrack, loud, brassy, flashy, intrepid, fearless, hardy, bodacious, venturous, daring, cheap, trashy, venturesome, brave, insolent, gaudy, garish, tatty, unfearing, bald, snotty-nosed, tawdry, brasslike, impudent, barefaced, bald-faced, dauntless, flash, tacky

   Antonyms:
   ashamed(p), tasteful