From Longman Dictionary of Contemporary Englishcaldroncal‧dron /ˈkɔːldrən $ ˈkɒːl-/ noun [countable] XXthe American spelling of cauldron
Examples from the Corpus
caldron• City College had a reputation as a caldron of black rage.• What they have done, however, is turn the sleepy municipal bond industry into a caldron of backbiting and finger-pointing.• Turn-of-the- century New Orleans was a caldron of cultures, equal parts poverty and wealth. 