“My car is a Lamborghini.” A noun doesn’t have to be a single word. A cluster of words can function together as a noun. “My car is the purple Lamborghini parked across three spaces.

Denotation is what a word literally means e.g. the skull is the bone structure in your head. Connotations are the ideas or feelings that a word might suggest e.g. a skull conjures up thoughts of ...