lever vs loosen

lever is a noun but loosen is not a noun.

Word	Noun	Adjective	Verb	Adverb
lever	Yes	No	Yes	No
loosen	No	No	Yes	No

lever (noun)	loosen (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

lever (verb)	loosen (verb)
to move or force, especially in an effort to get something open	become loose or looser or less tight
	make loose or looser
	make less dense
	disentangle and raise the fibers of
	cause to become loose
	become less severe or strict
	make less severe or strict