boost vs back up

boost is a noun but back up is not a noun.

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

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

Other hypernyms of boost include support.

boost (noun)	back up (noun)
the act of giving hope or support to someone
the act of giving a push
an increase in cost

boost (verb)	back up (verb)
increase or raise	establish as valid or genuine
give a boost to; be beneficial to	become or cause to become obstructed
push or shove upward, as if from below or behind	make a copy of (a computer file) especially for storage in another place as a security copy
increase	move backwards from a certain position
contribute to the progress or growth of	give moral or psychological support, aid, or courage to