sutura frontalis vs sutura

sutura frontalis and sutura both are nouns.

Word	Noun	Adjective	Verb	Adverb
sutura frontalis	Yes	No	No	No
sutura	Yes	No	No	No

As nouns, sutura is a hypernym of sutura frontalis; that is, sutura is a word with a broader meaning than sutura frontalis:

sutura frontalis: the suture between two halves of the frontal bone (usually obliterated by the age of 6)
sutura: an immovable joint (especially between the bones of the skull)

Other hypernyms of sutura frontalis include fibrous joint, suture.

sutura frontalis (noun)	sutura (noun)
the suture between two halves of the frontal bone (usually obliterated by the age of 6)	an immovable joint (especially between the bones of the skull)