toughie vs strong-armer

toughie and strong-armer both are nouns.

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

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

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

toughie (noun)	strong-armer (noun)
a particularly difficult or baffling question or problem	an aggressive and violent young criminal
an aggressive and violent young criminal