Highbrow rhymes with:
eyebrow, eyebrow, eyebrow, anyhow, bandow, barbakow, brandow, curacao, eyebrow, goodenough, jarchow, landau, lichtblau, luau, morgenthau, powwow, snowplow, somehow, sorkow, tsingtao, turnbough, yarbough
Highbrow sounds like:
hackberry, hasbro, hesper, hespera, hocevar, housekeeper