Untaxed rhymes with:
overtaxed, taxed, akst, axed, axt, bakst, baxt, faxed, maxed, overtaxed, relaxed, taxed, waxed
Untaxed sounds like:
unadjust, unadjusted, unattached, undecided, undetected, undisguised, uneducated, unhedged, unindicted, unmatched, unmitigated, unnoticed, untested, untouched