EXAMPLE:"The once and future king of comedy bombed at last night's show." In this example, the words, "The once and future king of comedy" are a noun phrase.

A fragment is a piece of communication that communicates something, but does not make a complete sentence,

EXAMPLE"Who bombed at the show last night?""The once and future king of comedy"

In this example, "the once and future king of comedy" is a fragment.