mandible vs mandibular bone

mandible and mandibular bone both are nouns.

Word	Noun	Adjective	Verb	Adverb
mandible	Yes	No	No	No
mandibular bone	Yes	No	No	No

As nouns, mandible and mandibular bone are synonyms defined as:

mandible and mandibular bone: the jaw in vertebrates that is hinged to open the mouth

Other synonyms of mandible include jawbone, jowl, lower jaw, lower jawbone, mandibula, submaxilla.

mandible (noun)	mandibular bone (noun)
the jaw in vertebrates that is hinged to open the mouth	the jaw in vertebrates that is hinged to open the mouth