bullyboy vs rowdy

bullyboy and rowdy both are nouns.

Word	Noun	Adjective	Verb	Adverb
bullyboy	Yes	No	No	No
rowdy	Yes	Yes	No	No

As nouns, rowdy is a hypernym of bullyboy; that is, rowdy is a word with a broader meaning than bullyboy:

bullyboy: a swaggering tough; usually one acting as an agent of a political faction
rowdy: a cruel and brutal fellow

Other hypernyms of bullyboy include bully, hooligan, roughneck, ruffian, tough, yob, yobbo, yobo.

bullyboy (noun)	rowdy (noun)
a swaggering tough; usually one acting as an agent of a political faction	a cruel and brutal fellow

bullyboy (adjective)	rowdy (adjective)
	disturbing the public peace; loud and rough