The Collaborative International Dictionary
Pluralizing
Pluralize \Plu"ral*ize\, v. t. [imp. & p. p. Pluralized; p. pr. & vb. n. Pluralizing.]
To make plural by using the plural termination; to attribute plurality to; to express in the plural form.
To multiply; to make manifold. [R.]
Wiktionary
pluralizing
vb. (present participle of pluralize English)