1. Antonyms for Bellowing include gentle, low, soft, quiet, silence, silentness, still, stillness, murmur and whispering

2. Antonyms for Caterwauling include quiet, silence, silentness, still, stillness, euphony, harmony, melodiousness, whisper and whispering

3. Antonyms for Clangour include quiet, silence, silentness, still, stillness, quietude, quietness, hush, peace and calm