Final answer:
A group of words that acts as the subject of a sentence without having a verb is referred to as a noun phrase.
Step-by-step explanation:
A group of words that acts as the subject of a sentence without containing a verb is called a noun phrase. This is because a phrase, by definition, is a group of words that function as a unit within a sentence but lacks a subject, a verb, or both. Unlike a dependent clause or an independent clause, which both include a subject and a verb and function as parts of a sentence, a noun phrase does not contain a verb and hence can only act as part of the subject, object, or other sentence element.