false teeth vs dental plate

false teeth and dental plate both are nouns.

Word	Noun	Adjective	Verb	Adverb
false teeth	Yes	No	No	No
dental plate	Yes	No	No	No

As nouns, dental plate is a hypernym of false teeth; that is, dental plate is a word with a broader meaning than false teeth:

Other hypernyms of false teeth include denture, plate.

false teeth (noun)	dental plate (noun)
a removable denture	a dental appliance that artificially replaces missing teeth