What are some concrete nouns that begin with the letter a?

Here are some concrete nouns beginning with the letter "a":

People:

* Actor

* Artist

* Athlete

* Author

Animals:

* Ant

* Aardvark

* Alligator

* Ape

Objects:

* Apple

* Airplane

* Arrow

* Anchor

* Axe

* Album

* Arm

* Aisle

* Anvil

Places:

* Apartment

* Arena

* Arch

* Avenue

* Airport

Things:

* Air

* Ash

* Acid

* Advice

* Angle

This is just a small sample! There are many other concrete nouns beginning with "a". Remember, concrete nouns are things that you can touch or sense.