back up vs recede

back up and recede both are verbs.

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

As verbs, recede is a hypernym of back up; that is, recede is a word with a broader meaning than back up:

Other hypernyms of back up include draw back, move back, pull away, pull back, retire, retreat, withdraw.

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