The use of a verb or an adjective as a noun, with or without morphological transformation, so that the word can now act as the head of a noun phrase(noun)
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Use "nominalization" in a sentence
"By the way, verb nominalization is the process that goes the other way."
"Creating a noun out of a verb is called ‘nominalization’."
"A style teacher I had a long time ago placed great emphasis on being aware of the use of nominalization — making nouns into verbs — as a means of avoiding wordiness."