break in vs set about

break in and set about both are verbs.

Word	Noun	Adjective	Verb	Adverb
break in	No	No	Yes	No
set about	No	No	Yes	No

As verbs, set about is a hypernym of break in; that is, set about is a word with a broader meaning than break in:

Other hypernyms of break in include begin, commence, get, get down, set out, start, start out.

break in (verb)	set about (verb)
make submissive, obedient, or useful	take the first step or steps in carrying out an action
break so as to fall inward	enter upon an activity or enterprise
start in a certain activity, enterprise, or role	begin to deal with
break into a conversation
intrude on uninvited
enter someone's (virtual or real) property in an unauthorized manner, usually with the intent to steal or commit a violent act