burst forth vs break loose

burst forth and break loose both are verbs.

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

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

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

Other synonyms of burst forth include explode.

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