THESAURUS
brighten
animate, beacon, boost, break,
brighten up, buoy up, burnish, cheer, cheer up, dawn, encourage, enlighten, enliven, exhilarate, flood with light, floodlight, gild, gild the lily, give a lift, gladden, grow bright, grow light, hearten, highlight, illume, illuminate, illumine, inspire, inspirit, invigorate, irradiate, light, light up, lighten, liven, luminate, overshine, perk up, pick up, polish, rejoice, rejoice the heart, relume, relumine, shed light upon, shine, shine upon, spotlight, sweeten, throw light upon, vitalize
ROGET THESAURUS
brighten
Light
VB
shine, glow, glitter, glister, glisten, twinkle, gleam, flare, flare up, glare, beam, shimmer, glimmer, flicker, sparkle, scintillate, coruscate, flash, blaze, be bright, reflect light, daze, dazzle, bedazzle, radiate, shoot out beams, fulgurate, clear up,
brighten, lighten, enlighten, levin, light, light up, irradiate, shine upon, give out a light, hang out a light, cast light upon, cast light in, throw light upon, throw light in, shed light upon, shed luster upon, illume, illumine, illuminate, relume, strike a light, kindle.