break loose vs burst forth

break loose and burst forth both are verbs.

Word	Noun	Adjective	Verb	Adverb
break loose	No	No	Yes	No
burst forth	No	No	Yes	No

As verbs, break loose and burst forth are synonyms defined as:

break loose and burst forth: be unleashed; emerge with violence or noise

Other synonyms of break loose include explode.

break loose (verb)	burst forth (verb)
be unleashed; emerge with violence or noise	be unleashed; emerge with violence or noise
run away from confinement	come into or as if into flower
	jump out from a hiding place and surprise (someone)