The
Oxford English Dictionary has this to say about Arminian and Arminian-related entries.
Arminian
A. adj. Of, belonging to, or following the doctrine of, James Arminius or Harmensen, a Dutch Protestant theologian, who put forth views opposed to those of Calvin, especially on Predestination. Arminius died in 1609; in 1618-19 his doctrines were condemned by the Synod of Dort; but they spread rapidly, and were embraced, in whole or part, by large sections of the Reformed Churches.
1618 tr. Barnevelds Apol. H, The point in question is not concerning the Arminian Religion, but Romish Poperie. 1674 HICKMAN Hist. Quinquart. 133 Before Bishop Laud ruled . . those who embraced the Opinions since called Arminian, were indeed out of the way to preferment. 1853 MARSDEN Early Puritans 99 The Calvinistic and Arminian controversy.
B. sb. An adherent of the doctrine of Arminius.
1618 tr. Barnevelds Apol. D, Winbergen is principall of the Perfectists, and you of the Arminians. 1673 MILTON True Relig. 7 The Arminian . . is condemn'd for setting up free will against free grace. c 1760 WESLEY Wks. 1872 X. 360 The Arminians believe, it [predestination] is conditional; the Calvinists, that it is absolute. 1834 Penny Cycl. II. 365 The Wesleyan Methodists call themselves Arminians, and their Magazine appeared formerly under the title of the Arminian Magazine.
† Arminianish,
a. Obs. rare. = ARMINIAN.
1700 in Somers Tracts V. 17 They have . . suffered to be printed all Arminianish, popish, vain books.
Arminianism
Arminian doctrines. or adherence to them.
1618 tr. Barnevelds Apol. Ded. A iij, Already wholy bent to Arminianisme. 1627 Let. fr. Jesuit in Rushw. Hist. Coll. (1659) I. 475 That Soveraign Drug Arminianism, which we hope will purge the Protestants from their Heresie. 1674 HICKMAN Hist. Quinquart. 227 He .. confirmed himself in his debauchedness, by his Arminianism. 1822 SYD. SMITH Wks. 1867 II. 5 The Articles of Religion are older than Arminianism, eo nomine.
Arminianize
a. trans. To make Arminian.
b. intr. To teach Arminianism.
Arminianized,
-izing,
Arminianizer, one who teaches or promotes Arminianism.
1637 GILLESPIE Eng. Pop. Cerem. Ep. A iij b, Many . . who are either Popish and Arminianized . . or silly ignorants. 1674 HICKMAN Hist. Quinquart. Some of our Arminianizing English Writers. 1692 Christ Exalted § 106 Antisozzo leans on the contrary side, and Arminianizeth. 1698 Ibid. Ded A iij, This will not go down with Arminianizers. 1698 CLARK Script. Justif. Introd. B, I have no Arminianizing Principles or Design.