parietomastoid suture vs suture

parietomastoid suture and suture both are nouns.

Word	Noun	Adjective	Verb	Adverb
parietomastoid suture	Yes	No	No	No
suture	Yes	No	Yes	No

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

parietomastoid suture: the suture between the parietal and the temporal bones
suture: an immovable joint (especially between the bones of the skull)

Other hypernyms of parietomastoid suture include fibrous joint, sutura.

parietomastoid suture (noun)	suture (noun)
the suture between the parietal and the temporal bones	thread of catgut or silk or wire used by surgeons to stitch tissues together
	a seam used in surgery
	an immovable joint (especially between the bones of the skull)

parietomastoid suture (verb)	suture (verb)
	join with a suture