articulatio vs sutura

articulatio and sutura both are nouns.

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

As nouns, sutura is a hyponym of articulatio; that is, sutura is a word with a more specific, narrower meaning than articulatio:

articulatio: (anatomy) the point of connection between two bones or elements of a skeleton (especially if it allows motion)
sutura: an immovable joint (especially between the bones of the skull)

articulatio (noun)	sutura (noun)
(anatomy) the point of connection between two bones or elements of a skeleton (especially if it allows motion)	an immovable joint (especially between the bones of the skull)