bog down vs break off

bog down and break off both are verbs.

Word	Noun	Adjective	Verb	Adverb
bog down	No	No	Yes	No
break off	No	No	Yes	No

As verbs, break off is a hypernym of bog down; that is, break off is a word with a broader meaning than bog down:

Other hypernyms of bog down include break, discontinue, stop.

bog down (verb)	break off (verb)
cause to slow down or get stuck	prevent completion
get stuck while doing something	interrupt before its natural or planned end
be unable to move further	break a small piece off from
cause to get stuck as if in a mire	break off (a piece from a whole)
	break a piece from a whole