lower jawbone vs submaxilla

lower jawbone and submaxilla both are nouns.

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

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

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

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

lower jawbone (noun)	submaxilla (noun)
the jaw in vertebrates that is hinged to open the mouth	the jaw in vertebrates that is hinged to open the mouth