The other part of a sentence

Oh, no no no.

The category was "They Come In Twos" and the clue was "The two main parts of a sentence are the subject and this unit."

The contestant said: "Verb."

NONONO

The answer is "Predicate."

Yes, predicates contain verbs. But a verb is (often) not a complete predicate. There are objects - direct and indirect (gave my brother a book); there are prepositional phrases (indirect objects can be expressed that way (bought a book for my brother); also goals and sources with verbs of movement (walked from the house to the library); instruments (drove in my car); predicate adjectivals (seems happy); adjuncts of time and place...

"Verb" is not the answer. Verb does not equal predicate.