Catalonia rhymes with:
valonia, valonia, ammonia, begonia, gonya, livonia, pneumonia, sonia, sonja, sonya, valonia
Catalonia sounds like:
caitlin, castellana, castellani, castellano, castellon, castillon, castleman, catalan, catalano, catalina, catalonian, cathleen, catlin, cattlemen, chitlin, coastline, codlin