sutura vs fibrous joint

sutura and fibrous joint both are nouns.

Word	Noun	Adjective	Verb	Adverb
sutura	Yes	No	No	No
fibrous joint	Yes	No	No	No

As nouns, sutura and fibrous joint are synonyms defined as:

sutura and fibrous joint: an immovable joint (especially between the bones of the skull)

Other synonyms of sutura include suture.

sutura (noun)	fibrous joint (noun)
an immovable joint (especially between the bones of the skull)	an immovable joint (especially between the bones of the skull)