Adnominalization is the act of transforming a word or a phrase into an adjective. Although there are no direct synonyms for this term, there are a few closely related words that can be used interchangeably in certain contexts. These words include nominalization, adjectivization, and adjectivation. Nominalization refers to turning a verb or another part of speech into a noun, while adjectivization and adjectivation refer specifically to turning words into adjectives. All these words share the common theme of converting words into new parts of speech. In summary, while adnominalization may not have any direct synonyms, related words can be used depending on the context.