projection vs tooth

projection and tooth both are nouns.

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

As nouns, tooth is a hyponym of projection; that is, tooth is a word with a more specific, narrower meaning than projection:

projection (noun)	tooth (noun)
the act of expelling or projecting or ejecting	a means of enforcement
the act of projecting out from something	toothlike structure in invertebrates found in the mouth or alimentary canal or on a shell
any structure that branches out from a central support	something resembling the tooth of an animal
the representation of a figure or solid on a plane as it would look from a particular direction	one of a number of uniform projections on a gear
a planned undertaking	hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense
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