pull away vs back off

pull away and back off both are verbs.

Word	Noun	Adjective	Verb	Adverb
pull away	No	No	Yes	No
back off	No	No	Yes	No

As verbs, back off is a hyponym of pull away; that is, back off is a word with a more specific, narrower meaning than pull away:

Other hyponyms of pull away include fall back, retreat, retrograde, back down, back up.

pull away (verb)	back off (verb)
pull back or move away or backward	move backwards from a certain position
	remove oneself from an obligation