bog vs break off

bog is a noun but break off is not a noun.

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

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

Other hypernyms of bog include break, discontinue, stop.

bog (noun)	break off (noun)
wet spongy ground of decomposing vegetation; has poorer drainage than a swamp; soil is unfit for cultivation but can be cut and dried and used for fuel

bog (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
	break a small piece off from
	break off (a piece from a whole)
	break a piece from a whole