Terracotta is sometimes created as terra cotta, and in addition terra-cotta. Pretty much all of the sources I go through pointed out that, in Italian, the literal that means is ‘fired earth’. The Latin origin on the Italian phrase is Terra Cocta. Tough to maintenance specific tiles if cracked: https://pots-flowers-design45555.blogpostie.com/50440428/a-simple-key-for-large-round-planter-unveiled