Unison rhymes with:
hannesson, jonassen, magnuson, magnussen, magnusson, monessen, venison, acheson, addison, allison, amason, andreassen, comparison, dickason, diocesan, eliason, eliassen, fergason, fergeson, ferguson, fergusson, furgason, genemedicine, grieveson, hannesson, higgason, iason, jesudason, jonassen, liason, liasson, madison, magnuson, magnussen, magnusson, marcussen, markuson, matheson, mathiasen, mathiason, medicine, monessen, myosin, niacin, nicoson, ottoson, oveson, purgason, radisson, rasmuson, rasmussen, rasmusson, thomason, thomassen, thomasson, tobiason, vargason, venison
Unison sounds like:
uncanny, uncommon, unicom, unikom, unionism, unisom, unknown, unosom, unscom, unseen, unshaken