When two or more words are used as a single adjective to modify a noun, that adjective becomes a adjective.
coordinate
compound
predicate

When two or more words are used as a single adjective to modify a noun, that adjective becomes a compound adjective.

Explanation:

A compound adjective is an adjective made up of two or more words, in which either of those words can be a noun, an adjective, an adverb, a verb in their past participle form or a verb in their present participle form. This type of adjectives words may be joined by a hyphen or they may not, either way, they are used as a single adjective to modify a noun. Some examples:

There's a sourdough bread on the table

I have a part-time job

My mom is a middle-aged woman