lower jawbone vs jowl

lower jawbone and jowl both are nouns.

Word	Noun	Adjective	Verb	Adverb
lower jawbone	Yes	No	No	No
jowl	Yes	No	No	No

As nouns, lower jawbone and jowl are synonyms defined as:

lower jawbone and jowl: the jaw in vertebrates that is hinged to open the mouth

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

lower jawbone (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)