ball-buster vs ball-breaker

ball-buster and ball-breaker both are nouns.

Word	Noun	Adjective	Verb	Adverb
ball-buster	Yes	No	No	No
ball-breaker	Yes	No	No	No

As nouns, ball-buster and ball-breaker are synonyms defined as:

ball-buster and ball-breaker: a job or situation that is demanding and arduous and punishing

As nouns, ball-buster and ball-breaker are synonyms defined as:

ball-buster and ball-breaker: a demanding woman who destroys men's confidence

ball-buster (noun)	ball-breaker (noun)
a job or situation that is demanding and arduous and punishing	a job or situation that is demanding and arduous and punishing
a demanding woman who destroys men's confidence	a demanding woman who destroys men's confidence