high treason vs law-breaking

high treason and law-breaking both are nouns.

Word	Noun	Adjective	Verb	Adverb
high treason	Yes	No	No	No
law-breaking	Yes	No	No	No

As nouns, law-breaking is a hypernym of high treason; that is, law-breaking is a word with a broader meaning than high treason:

high treason: a crime that undermines the offender's government
law-breaking: (criminal law) an act punishable by law; usually considered an evil act

Other hypernyms of high treason include crime, criminal offence, criminal offense.

high treason (noun)	law-breaking (noun)
a crime that undermines the offender's government	(criminal law) an act punishable by law; usually considered an evil act