endodontist vs dentist

endodontist and dentist both are nouns.

Word	Noun	Adjective	Verb	Adverb
endodontist	Yes	No	No	No
dentist	Yes	No	No	No

As nouns, dentist is a hypernym of endodontist; that is, dentist is a word with a broader meaning than endodontist:

endodontist: a dentist specializing in diseases of the dental pulp and nerve
dentist: a person qualified to practice dentistry

Other hypernyms of endodontist include dental practitioner, tooth doctor.

endodontist (noun)	dentist (noun)
a dentist specializing in diseases of the dental pulp and nerve	a person qualified to practice dentistry