chip off vs break off

chip off and break off both are verbs.

Word	Noun	Adjective	Verb	Adverb
chip off	No	No	Yes	No
break off	No	No	Yes	No

As verbs, chip off and break off are synonyms defined as:

Other synonyms of chip off include break away, chip, come off.

chip off (verb)	break off (verb)
break off (a piece from a whole)	prevent completion
	interrupt before its natural or planned end
	break a small piece off from
	break off (a piece from a whole)
	break a piece from a whole