<human>:  What is the difference between a noun and an adjective in English?
<bot>: The main difference between a noun and an adjective in English is that nouns are used to name people, places, things, and ideas, while adjectives are used to describe nouns and give more information about them. For example, the word "dog" is a noun, and the word "smiling" is an adjective, so we could say "the smiling dog".