What's the difference between augustinian and augustinianism?

Augustinian

Definition:

(n.) A member of one of the religious orders called after St. Augustine; an Austin friar.
(a.) Of or pertaining to St. Augustine, bishop of Hippo in Northern Africa (b. 354 -- d. 430), or to his doctrines.
(n.) One of a class of divines, who, following St. Augustine, maintain that grace by its nature is effectual absolutely and creatively, not relatively and conditionally.

Example Sentences:

(1) If you’re a football fan, the collection of billionaires and their federally protected cartel present the American faithful with so many ethical dilemmas that even DirectTV’s Sunday Ticket satellite package – not only picking a game from the TV guide, but simply the act of paying for it – can send you through a vaguely Augustinian self-recrimination.
(2) Written with style and great clarity, it revealed a remarkable array of revolutionary, heretical medieval movements, strongly influenced by the Bible's book of Revelation, who were opposed to the orthodox Augustinian view that the Roman Catholic church had fully realised the millennium (a state of spiritual perfection) on Earth.
(3) A comparison between the theories presented shows that the moral interpretation of human malformation is an inevitable consequence of the augustinian theological thinking.
(4) His hardships engendered illness which threatened continuation and completion of his studies until he was afforded the chance of absolving successfully theological studies as an Augustinian monk in the famous chapter of St. Thomas in Altbrünn (Staré Brno).

Definition:

Example Sentences:

(1) If you’re a football fan, the collection of billionaires and their federally protected cartel present the American faithful with so many ethical dilemmas that even DirectTV’s Sunday Ticket satellite package – not only picking a game from the TV guide, but simply the act of paying for it – can send you through a vaguely Augustinian self-recrimination.
(2) Written with style and great clarity, it revealed a remarkable array of revolutionary, heretical medieval movements, strongly influenced by the Bible's book of Revelation, who were opposed to the orthodox Augustinian view that the Roman Catholic church had fully realised the millennium (a state of spiritual perfection) on Earth.
(3) A comparison between the theories presented shows that the moral interpretation of human malformation is an inevitable consequence of the augustinian theological thinking.
(4) His hardships engendered illness which threatened continuation and completion of his studies until he was afforded the chance of absolving successfully theological studies as an Augustinian monk in the famous chapter of St. Thomas in Altbrünn (Staré Brno).