Bostian rhymes with:
bastian, bastian, chechen, cochin, cutchin, derchin, duchin, kitchin, machin, minchin, patchin, paustian, pechin, qichen, truncheon, turchin, turchyn, watchin'
Bostian sounds like:
bagdon, baisden, basden, basten, bastian, bastien, bastin, bastion, baston, bastone, beaston, becton, begotten, bigtime, biosystem, bogdan, bogden, bogdon, boston, bostonian, boughten, boughton, boustany, buckstein, bustin, buxton