oral cavity vs tongue

oral cavity and tongue both are nouns.

Word	Noun	Adjective	Verb	Adverb
oral cavity	Yes	No	No	No
tongue	Yes	No	Yes	No

oral cavity (noun)	tongue (noun)
the opening through which food is taken in and vocalizations emerge	the flap of material under the laces of a shoe or boot
	metal striker that hangs inside a bell and makes a sound by hitting the side
	a mobile mass of muscular tissue covered with mucous membrane and located in the oral cavity
	a human written or spoken language used by a community; opposed to e.g. a computer language
	a manner of speaking
	the tongue of certain animals used as meat
	a narrow strip of land that juts out into the sea
	any long thin projection that is transient

oral cavity (verb)	tongue (verb)
	lick or explore with the tongue
	articulate by tonguing, as when playing wind instruments