I don't know what you're asking for, so I'll tell you all answers. First paragraph, definition. Second paragraph, differences and similarities. Third, examples.
Common noun; A person, place or/and thing. As for Proper noun; An individual person, place, or/and organization, has to have a capitol at the beginning of the word.
Proper nouns; has to start with a capitol. Doesn't have things, only organizations. Common nouns; Doesn't have to start with capitol. Doesn't have organizations, only things. Proper nouns and Common nouns; Both have people, and places.
Proper nouns; Snickers, Spiderman, Barbie, Pepsi, Robert, Maria, Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Illinois, Indiana, Idaho, Iowa, Kentucky, Kansas, Louisiana, Montana, Michigan, Minnesota, Missouri, Mississippi, and that's as far as I made it in the Fifty Nifty United States From The Thirteen Original Colonies. Common nouns: teacher, student, phone, store, girl, Hannah, Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Illinois, Indiana, Idaho, Iowa, Kentucky, Kansas, Louisiana, Michigan, Minnesota, Missouri, Montana, and Mississippi.