indorse vs back up

indorse and back up both are verbs.

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

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

Other hypernyms of indorse include support.

indorse (verb)	back up (verb)
sign as evidence of legal transfer	establish as valid or genuine
be behind; approve of	become or cause to become obstructed
guarantee as meeting a certain standard	make a copy of (a computer file) especially for storage in another place as a security copy
give support or one's approval to	move backwards from a certain position
	give moral or psychological support, aid, or courage to