A as in …

Aaron

Abortion

Absolute

Accident

Accidental

Accordance

Account

Acne

Act

Active

Actuality

Ad

Adam

ADD

Addiction

Adoption

Affairs

Africa

African

Age

Aid

Aim

Air

Airplane

Airport

Alcohol

Aliveness

Alley

Alligator

Aloneness

Alphabet

Alzheimers

Amateur

Amazement

Amazon

Ambulance

America

American

Amish

Amount

Amputation

Anal Sex

Ancient

Angel

Animal

Ankle

Answer

Antenna

Anthony

Anti

Anti-jokes

Apartment

Apology

Appetite

Apple

April

Arabia

Area

Argon

Arguing

Argument

Ark

Arms

Army

Arrest

Arrival

Artist

Ash Can

Asian

Ass

Asshole

Astronaut

Astronomer

At Home

Atheist

Atom

Attack

Attendance

Attention

Attraction

Aunt

Australia

Author

Autism

Avoidance

Awkwardness

Axe