Bastien rhymes with:
baston, aston, baston, casten, caston, gaston, haston, kasten, masten, maston
Bastien sounds like:
bagdon, baisden, basden, basten, bastian, bastin, bastion, baston, bastone, beaston, becton, begotten, bigtime, biosystem, bogdan, bogden, bogdon, bostian, boston, bostonian, boughten, boughton, boustany, buckstein, bustin, buxton