Bulgaria's rhymes with:
area's, areas, bavaria's, farias, peria's, algeria's, andrea's, area's, areas, arias, austria's, bacteria's, bavaria's, cafeterias, confiterias, deandrea's, farias, iberia's, koreas, liberia's, nigeria's, peoria's, peria's, pretoria's, rosaria's, syria's, victoria's, victorias
Bulgaria's sounds like:
balcerowicz, balcerzak, bellcore's, blackrock, blasier's, blazers, bleachers, blockers, bluegrass, bolger's