drop the ball vs breach

drop the ball is not a noun while breach is a noun.

Word	Noun	Adjective	Verb	Adverb
drop the ball	No	No	Yes	No
breach	Yes	No	Yes	No

As verbs, breach is a hypernym of drop the ball; that is, breach is a word with a broader meaning than drop the ball:

Other hypernyms of drop the ball include break, go against, infract, offend, transgress, violate.

drop the ball (noun)	breach (noun)
	a failure to perform some promised act or obligation
	a personal or social separation (as between opposing factions)
	an opening (especially a gap in a dike or fortification)

drop the ball (verb)	breach (verb)
commit a faux pas or a fault or make a serious mistake	make an opening or gap in
	act in disregard of laws, rules, contracts, or promises