simple machine vs lever

simple machine and lever both are nouns.

Word	Noun	Adjective	Verb	Adverb
simple machine	Yes	No	No	No
lever	Yes	No	Yes	No

As nouns, lever is a hyponym of simple machine; that is, lever is a word with a more specific, narrower meaning than simple machine:

simple machine: a device for overcoming resistance at one point by applying force at some other point
lever: a simple machine that gives a mechanical advantage when given a fulcrum

Other hyponyms of simple machine include inclined plane, block, pulley-block, pulley, pulley block, wheel.

simple machine (noun)	lever (noun)
a device for overcoming resistance at one point by applying force at some other point	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

simple machine (verb)	lever (verb)
	to move or force, especially in an effort to get something open