chore vs ball-breaker

chore and ball-breaker both are nouns.

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

As nouns, ball-breaker is a hyponym of chore; that is, ball-breaker is a word with a more specific, narrower meaning than chore:

chore: a specific piece of work required to be done as a duty or for a specific fee
ball-breaker: a job or situation that is demanding and arduous and punishing

Other hyponyms of chore include ball-buster, stint, scut work, shitwork.

chore (noun)	ball-breaker (noun)
a specific piece of work required to be done as a duty or for a specific fee	a job or situation that is demanding and arduous and punishing
	a demanding woman who destroys men's confidence