Singular noun – names a single person, place or thing (e.g., boy, house, cat)

Plural noun – names more than one person, place or thing (e.g., add ­–s or –es)

Common noun – a general name of a person, place, thing, or an idea (e.g., boy, city)

Proper noun – names a specific person, place, thing or idea and always begins with a capital letter (e.g., John, Chicago)