recede vs back up

recede and back up both are verbs.

Word	Noun	Adjective	Verb	Adverb
recede	No	No	Yes	No
back up	No	No	Yes	No

As verbs, back up is a hyponym of recede; that is, back up is a word with a more specific, narrower meaning than recede:

Other hyponyms of recede include fall back, retreat, retrograde, back down, back off.

recede (verb)	back up (verb)
become faint or more distant	establish as valid or genuine
retreat	become or cause to become obstructed
pull back or move away or backward	make a copy of (a computer file) especially for storage in another place as a security copy
	move backwards from a certain position
	give moral or psychological support, aid, or courage to