strong-armer vs hoodlum

strong-armer and hoodlum both are nouns.

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

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

Other synonyms of strong-armer include goon, hood, punk, thug, tough, toughie.

strong-armer (noun)	hoodlum (noun)
an aggressive and violent young criminal	an aggressive and violent young criminal