"bellowing" in the noun sense
1. bellow, bellowing, holla, holler, hollering, hollo, holloa, roar, roaring, yowl
a very loud utterance (like the sound of an animal
"his bellow filled the hallway"
"bellowing" in the verb sense
1. bawl, bellow
shout loudly and without restraint
2. bellow, roar
make a loud noise, as of animal
"The bull bellowed"
Source: WordNet® (An amazing lexical database of English)
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