teeth vs dentition

teeth and dentition both are nouns.

Word	Noun	Adjective	Verb	Adverb
teeth	Yes	No	No	No
dentition	Yes	No	No	No

As nouns, teeth and dentition are synonyms defined as:

teeth and dentition: the kind and number and arrangement of teeth (collectively) in a person or animal

teeth (noun)	dentition (noun)
the kind and number and arrangement of teeth (collectively) in a person or animal	the kind and number and arrangement of teeth (collectively) in a person or animal
	the eruption through the gums of baby teeth