Balthaser rhymes with:
balthasar, balthasar, balthasar, balthasar, balthasar, curiouser, elsasser, flagofficer, furiouser, kleinsasser, levasseur, officer, purchaser
Balthaser sounds like:
baldassare, baldassari, baldassarre, baltazar, balthasar, balthazar, balthazor, baltzer, blitzer, bloodsucker, blotchier, bulldozer