spine vs projection

spine and projection both are nouns.

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

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

spine (noun)	projection (noun)
a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin	the act of expelling or projecting or ejecting
the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved	the act of projecting out from something
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord	any structure that branches out from a central support
a small sharp-pointed tip resembling a spike on a stem or leaf	the representation of a figure or solid on a plane as it would look from a particular direction
any sharply pointed projection	a planned undertaking
	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