What's the difference between synarthroses and synarthrosis?

Synarthroses

Definition:

Example Sentences:

(1) Kinematically, the difference between diarthroses and synarthroses is established by the fact that diarthroses possess axes of rotation which are approximately fixed relatively to the morphology of the corresponding functional surfaces while in synarthroses the positions of rotational axes depend on the geometric structure of the applied and transferred force system.
(2) Because of their adhesive connection to the corresponding bony structures synarthroses can transfer shear stresses while diarthroses can only be loaded by forces which act normal to their functional surfaces.
(3) Its position upon that is determined by the geometry of the applied force system according to the "reciprocal theorem of synarthroses".
(4) Also in the other parts of the skeleton of the feet, synarthroses with different extensions are found.
(5) Diarthroses and synarthroses are statically distinguished by the character of force transfer.

Definition:

(n.) Immovable articulation by close union, as in sutures. It sometimes includes symphysial articulations also. See the Note under Articulation, n., 1.

Example Sentences:

(1) In the following study we will present a model that demonstrates the effects of normal, shearing, and general forces applied to the synarthrosis of the "intervertebral disk".
(2) The simpliest synarthrosis is represented by a (visco-)elastic disk that connects two rigid bodies.
(3) Therefore, the interface between the body structure and the elastic synarthrosis can be considered as a surface of infinite static (adhesive) friction, while the contacting surfaces in a diathrosis possess vanishing static friction.
(4) The unusual feature is the early synarthrosis, possibly caused by multiple factors.
(5) According to manifestation degree of these layers, development of the internal layer and size of the cavity three main variants of the ID structure are nominated: intervertebral synarthrosis, intervertebral hemiarthrosis and intervertebral "diathrosis" (real articulations have not been revealed between the vertebral bodies).
(6) The theory--presented in part I--shall be examined by the synarthrosis (Gomphosis; Articulatio dentoalaveolaris) "Periodontium" and not by the intervertebral disk because the required experimental equipment can probably also be used in vivo.