v. Gram. [f. SUBSTANTIVE sb. + -IZE.] trans. To convert into a substantive.
1863. E. Masson, trans. Winers Gram. N. T., 340. The Inf[initive] distinctly substantivised by means of the Article is also employed in the oblique cases.
1887. Amer. Jrnl. Philol., VIII. 104. The substantivized être, pouvoir, vouloir, savoir.
1901. M. Callaway, in Publ. Mod. Lang. Assoc. Amer., XVI. 141. The substantivized participle.