Several three-syllable English words, like "caramel," "jewelry" and "Realtor," are pronounced as having just two syllables, ...

A noun doesn’t have to be a single word. A cluster of words can function ... in that sentence is part of a larger noun phrase, all serving as the noun introduced by “is.” ...

All words belong to a word class. It’s that word’s type: nouns, verbs, adjectives, adverbs, pronouns, prepositions, conjunctions, determiners and exclamations. These are all word classes.