Proper: a person or place that is capitalised; New York, China, Earth.

Abstract: something that you can’t touch; love, freedom, thought.

Concrete: anything you can touch; computer, poster, book.

Noun

A noun belonging to the class of words used as names for unique individuals, events, or places. Also called proper name.

ex. Gloria, Norway, John Wayne

abstract noun:

Noun

A noun that denotes an abstract or intangible concept, such as envy or joy

concrete noun:

Noun

A noun, such as flower or rain, that denotes a material or tangible object or phenomenon.

abstract is something that you can’t pin down whereas concrete is a definite thing.

I’m not giving examples b/c I think you want me to do your homework.