holloa vs bellowing

holloa and bellowing both are nouns.

Word	Noun	Adjective	Verb	Adverb
holloa	Yes	No	No	No
bellowing	Yes	No	No	No

As nouns, holloa and bellowing are synonyms defined as:

holloa and bellowing: a very loud utterance (like the sound of an animal)

Other synonyms of holloa include bellow, holla, holler, hollering, hollo, roar, roaring, yowl.

holloa (noun)	bellowing (noun)
a very loud utterance (like the sound of an animal)	a very loud utterance (like the sound of an animal)