Bostonian rhymes with:
estonian, houstonian, estonian, houstonian, newtonian, plutonian, washingtonian, amazonian, andonian, apollonian, babylonian, caledonian, devonian, draconian, estonian, gorgonian, houstonian, jacksonian, jeffersonian, melkonian, newtonian, oregonian, patagonian, plutonian, simonian, smithsonian, usoniam, washingtonian
Bostonian sounds like:
bagdon, baisden, basden, basten, bastian, bastien, bastin, bastion, baston, bastone, beaston, becton, begotten, bigtime, biosystem, bogdan, bogden, bogdon, bostian, boston, boughten, boughton, boustany, buckstein, bustin, buxton