A predicate noun is a a sub category inside a noun, which is a part of speech itself. It is simply a noun in the predicate.
The part of speech for "answer" is a noun.
Touchdown is a noun.
A predicate nominative is a noun or a pronoun. A predicate noun is a noun.
The part of speech for "lecturer" is a noun.
Noun
An active verb is required; any other part of speech may be present.
noun
the part of speech for playing is a predicate adjective.
The only necessary part of speech in a predicate is a verb, but a complete predicate may include any other part of speech, with the possible exception of an interjection.
Depends on the sentence. "The 1930s were the highlight of American culture." - subject, noun. "Wow, your jeans are sooo 1930s." - predicate adjective, adjective "I haven't partied that hard since the 1930s." - not sure, but a noun. "How were the 1930s?" - predicate nominative, noun.
"Horses gallop" is a complete sentence consisting or subject and predicate: "horses" is a noun, and "gallop" is a verb.
Verbs
The part of speech for "answer" is a noun.
predicate adjective
The part of speech for "archaeologist" is a noun.
A predicate noun (also called a predicate nominative) is part of the predicate of a sentence rather than being the subject. A predicate noun follows a linking verb. The predicate noun is used to tell what the subject is, was, became, look, seem, etc.Jason is my cousin.Lucy's favorite color is yellow.When we were kids, we were called The Moppets.
Permission is a noun.