break out vs break loose

break out and break loose both are verbs.

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

As verbs, break loose is a hypernym of break out; that is, break loose is a word with a broader meaning than break out:

Other hypernyms of break out include escape, get away.

break out (verb)	break loose (verb)
become raw or open	be unleashed; emerge with violence or noise
begin suddenly and sometimes violently	run away from confinement
start abruptly
take from stowage in preparation for use
move away or escape suddenly