nominalization of a verb or adjective conjugation; use of a conjugation as a noun
A grammatical term referring to the use of a verb or adjective conjugation form (especially the 連用形) as a noun. For example, 走り (from 走る) or 静かさ (from 静かだ).
See also: 連用形
"Hashiri" is an example of nominalization of the ren'yōkei form of the verb "hashiru."
Using the ren'yōkei form of an adjective as a noun is also a type of nominalization.
体言化 is a more general term for nominalization, while 名詞法 specifically refers to using a conjugation form as a noun.
Compound of 名詞 (noun) and 法 (method, rule), literally 'noun method'.