strong-arm vs bully

strong-arm is not a noun while bully is a noun.

Word	Noun	Adjective	Verb	Adverb
strong-arm	No	Yes	Yes	No
bully	Yes	Yes	Yes	No

As verbs, strong-arm and bully are synonyms defined as:

Other synonyms of strong-arm include ballyrag, boss around, browbeat, bullyrag, hector, push around.

strong-arm (noun)	bully (noun)
	a cruel and brutal fellow
	a hired thug

strong-arm (adjective)	bully (adjective)
impelled by physical force especially against resistance	excellent

strong-arm (verb)	bully (verb)
use physical force against	discourage or frighten with threats or a domineering manner; intimidate
be bossy towards	be bossy towards
use force against