mandibular bone vs jowl

mandibular bone and jowl both are nouns.

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

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

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

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

mandibular bone (noun)	jowl (noun)
the jaw in vertebrates that is hinged to open the mouth	the jaw in vertebrates that is hinged to open the mouth
	a fullness and looseness of the flesh of the lower cheek and jaw (characteristic of aging)