Andreassen rhymes with:
comparison, acheson, addison, allison, amason, 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, unison, vargason, venison
Andreassen sounds like:
amateurism, andersen, anderson, andersson, andreasen, andreason, andresen, andriessen, androgyny