In the sentence

They are not nuts.

They is the subject
Are is the verb
What is the predicate word?

3 answers

Please use the correct terminology. I assume you're looking for a predicate noun or predicate adjective.

What do you think the predicate noun is?
The directions say preficate word.

I think not?
No. Not is an adverb.

The predicate noun is "nuts."

The directions should use correct terminology. A Google search for predicate word yields nothing. A Google search for predicate noun or adjective or subject complement shows many grammar pages.