Underrated rhymes with:
overrated, berated, desecrated, grated, overrated, unrated, abated, annotated, baited, bated, belated, berated, conjugated, dated, debated, deflated, desecrated, equated, fated, feted, gated, grated, interrelated, mated, misstated, overrated, overweighted, predated, reinstated, related, restated, sated, sedated, skated, slated, unabated, undated, underweighted, unrated, unrelated, unstated, weighted
Underrated sounds like:
underrate, undertow, underwood, underwrite, underwrote, undeterred, unhindered, unitrode, untoward, untreated, untried, untruth