Bulgarians rhymes with:
hungarians, aeriens, barbarians, bilzerian's, centenarians, contrarians, disciplinarians, humanitarians, hungarians, kazarian's, libertarians, librarians, marian's, marion's, parliamentarians, seminarians, totalitarians, vegetarians, veterinarians
Bulgarians sounds like:
beleaguering, beligerence, belligerence, bilzerian's