burst out vs deepen

burst out and deepen both are verbs.

Word	Noun	Adjective	Verb	Adverb
burst out	No	No	Yes	No
deepen	No	No	Yes	No

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

Other hypernyms of burst out include intensify.

burst out (verb)	deepen (verb)
erupt or intensify suddenly	become more intense
give sudden release to an expression	make more intense, stronger, or more marked
appear suddenly or unexpectedly; happen unexpectedly	become deeper in tone
	make deeper