break off vs bog

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

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

As verbs, bog is a hyponym of break off; that is, bog is a word with a more specific, narrower meaning than break off:

Other hyponyms of break off include fracture, bog down, break up, cut off, disrupt, interrupt.

break off (noun)	bog (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

break off (verb)	bog (verb)
prevent completion	cause to slow down or get stuck
interrupt before its natural or planned end	get stuck while doing something
break a small piece off from
break off (a piece from a whole)
break a piece from a whole