WordNet sense 1 (of lustrous grey; covered with or tinged with the color of silver):

argent, silver, silverish

WordNet sense 2 (having no hue):

achromatic

WordNet sense 3 (resembling or reminiscent of silver):

silvern

WordNet sense 4 (having a pleasant sound):

euphonious, euphonous

WordNet sense 5 (emitting or reflecting light readily or in large amounts):

bright