bullyboy vs bully

bullyboy and bully both are nouns.

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

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

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

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

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

bullyboy (adjective)	bully (adjective)
	excellent

bullyboy (verb)	bully (verb)
	discourage or frighten with threats or a domineering manner; intimidate
	be bossy towards