break out vs breakout

break out is not a noun while breakout is a noun.

Word	Noun	Adjective	Verb	Adverb
break out	No	No	Yes	No
breakout	Yes	No	No	No

break out (noun)	breakout (noun)
	an escape from jail

break out (verb)	breakout (verb)
become raw or open
begin suddenly and sometimes violently
start abruptly
take from stowage in preparation for use
move away or escape suddenly