Unaffected rhymes with:
disaffected, defected, disaffected, uninfected, defected, deflected, dejected, disaffected, disconnected, disrespected, ejected, inspected, interconnected, interjected, intersected, misdirected, recollected, reconnected, redirected, rejected, respected, resurrected, subjected, uncollected, unconnected, uncorrected, undetected, unelected, unexpected, uninfected, unprotected, unsuspected
Unaffected sounds like:
unabashed, unbiased, unfazed, unfocused, uninfected, unopposed, unpacked