tongue vs oral cavity

tongue and oral cavity both are nouns.

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

tongue (noun)	oral cavity (noun)
the flap of material under the laces of a shoe or boot	the opening through which food is taken in and vocalizations emerge
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

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