open up vs lever

open up is not a noun while lever is a noun.

Word	Noun	Adjective	Verb	Adverb
open up	No	No	Yes	No
lever	Yes	No	Yes	No

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

Other hyponyms of open up include unbar, break open, click open, reopen, unlock, unbolt, unseal, uncork, jimmy, prise, prize, pry, breach, gap, lance.

open up (noun)	lever (noun)
	a rigid bar pivoted about a fulcrum
	a flat metal tumbler in a lever lock
	a simple machine that gives a mechanical advantage when given a fulcrum

open up (verb)	lever (verb)
make available	to move or force, especially in an effort to get something open
become available
talk freely and without inhibition
cause to open or to become open
become open
open up an area or prepare a way
start to operate or function or cause to start operating or functioning