Undated rhymes with:
dated, predated, sedated, 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, underrated, underweighted, unrated, unrelated, unstated, weighted
Undated sounds like:
uinta, unaided, unamended, unanimity, unaudited, und, undid, undo, undue, unedited, unheeded, unimate, unimedia, uninitiated, unit, unita, unite, united, unity, unmade, unmanned, unmet, unnamed, unneeded, unted, untidy, untie, untied, untiedt, unto, unwanted, unwed, unwind, unwound