ADJECTIVE
Attributive
adjective
Predicative
adjective
Nominal
adjective
are part of the noun phrase headed by
the noun they modify.
For example:
"I saw three happy kids", and "I saw three kids happy enough to jump up and down with glee."
are linked via a copula or other linking mechanism to the noun or pronoun they modify.
For example:
“They are happy" and in "that made me happy."
act almost as nouns. One way this can happen is if a noun is elided and an attributive adjective is left behind.
For example:
"happy one" or "happy book".