Boomsma rhymes with:
asthma, bergsma, blepharisma, bouwsma, charisma, cosma, kozma, kuzma, ledezma, miasma, plasma, steensma
Boomsma sounds like:
bahnsen, bangemann, banken, bankson, beenken, behnken, bencomo, benign, benigna, benigno, benjamin, benjimen, bennigan, bennison, bensen, benskin, bensman, benson, benzene, benzine, bianchini, bianconi, bingaman, bingham, bingman, bongjin