goon vs strong-armer

goon and strong-armer both are nouns.

Word	Noun	Adjective	Verb	Adverb
goon	Yes	No	No	No
strong-armer	Yes	No	No	No

As nouns, goon and strong-armer are synonyms defined as:

Other synonyms of goon include hood, hoodlum, punk, thug, tough, toughie.

goon (noun)	strong-armer (noun)
an awkward stupid person	an aggressive and violent young criminal
an aggressive and violent young criminal