break-in vs burglary

break-in and burglary both are nouns.

Word	Noun	Adjective	Verb	Adverb
break-in	Yes	No	No	No
burglary	Yes	No	No	No

As nouns, burglary is a hypernym of break-in; that is, burglary is a word with a broader meaning than break-in:

break-in: trespassing for an unlawful purpose; illegal entrance into premises with criminal intent
burglary: entering a building unlawfully with intent to commit a felony or to steal valuable property

break-in (noun)	burglary (noun)
trespassing for an unlawful purpose; illegal entrance into premises with criminal intent	entering a building unlawfully with intent to commit a felony or to steal valuable property