coronal suture vs sutura

coronal suture and sutura both are nouns.

Word	Noun	Adjective	Verb	Adverb
coronal suture	Yes	No	No	No
sutura	Yes	No	No	No

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

coronal suture: the suture between the parietal and frontal bones of the skull
sutura: an immovable joint (especially between the bones of the skull)

Other hypernyms of coronal suture include fibrous joint, suture.

coronal suture (noun)	sutura (noun)
the suture between the parietal and frontal bones of the skull	an immovable joint (especially between the bones of the skull)