shadowboxing vs practice

shadowboxing and practice both are nouns.

Word	Noun	Adjective	Verb	Adverb
shadowboxing	Yes	No	No	No
practice	Yes	No	Yes	No

As nouns, practice is a hypernym of shadowboxing; that is, practice is a word with a broader meaning than shadowboxing:

shadowboxing: sparring with an imaginary opponent (for exercise or training)
practice: systematic training by multiple repetitions

Other hypernyms of shadowboxing include drill, exercise, practice session, recitation.

shadowboxing (noun)	practice (noun)
sparring with an imaginary opponent (for exercise or training)	a customary way of operation or behavior
	systematic training by multiple repetitions
	the exercise of a profession
	translating an idea into action
	knowledge of how something is usually done

shadowboxing (verb)	practice (verb)
	learn by repetition
	engage in a rehearsal (of)
	carry out or practice; as of jobs and professions
	avail oneself to
	engage in or perform