It could be if you wanted to say something like a metal machine as metal would then be describing the machine. However, metallic would also work as an adjective and it is synonymous.
it can used as a noun or as an adjective
metallic
The name of the metal is aurum (-i, n.). The adjective meaning "made of gold" (as in, for example, "a gold watch") is aureus, -a, -um).
metallic
Yes, ambitious is an adjective. Example: an ambitiousstudent.
Advance is the adjective for the noun advancement, for example: an advance payment.Advanced is the adjective form for the verb to advance, for example: an advanced class.
Inventive is an adjective. Example: What an inventiveidea!Unreserved is an adjective, as well. Example: Randy is unreserved, which tends to offend some people.
nonmetallic
No,but it can be. Example, ''That is rudeness'', The rule is if the word ends in ''ness'' it can be an adjective.
No
adjective is the words that describe a noun or a pronoun, and an example of an adjective is beautiful ex sentence The beautiful girl is sitting next to me.
show me a example of predicate adjective involing a sentence "The girl is TIRED tonight."