limb vs projection

limb and projection both are nouns.

Word	Noun	Adjective	Verb	Adverb
limb	Yes	No	No	No
projection	Yes	No	No	No

As nouns, projection is a hypernym of limb; that is, projection is a word with a broader meaning than limb:

limb (noun)	projection (noun)
any projection that is thought to resemble a human arm	the act of expelling or projecting or ejecting
the graduated arc that is attached to an instrument for measuring angles	the act of projecting out from something
either of the two halves of a bow from handle to tip	any structure that branches out from a central support
one of the jointed appendages of an animal used for locomotion or grasping: arm, leg, wing, flipper	the representation of a figure or solid on a plane as it would look from a particular direction
(astronomy) the circumferential edge of the apparent disc of the sun or the moon or a planet	a planned undertaking
any of the main branches arising from the trunk or a bough of a tree	a prediction made by extrapolating from past observations
	the projection of an image from a film onto a screen
	the acoustic phenomenon that gives sound a penetrating quality
	(psychiatry) a defense mechanism by which your own traits and emotions are attributed to someone else
	any solid convex shape that juts out from something