Adversarial  

Adjective |ad-vuhs-euh-ree-uhl
relating to hostile opposition

Advent  

Noun | ad-vent
the arrival or creation of something

Adequate  

Adjective | ad-i-kwit
having sufficient qualifications to meet a specific task or purpose

Adept  

Adjective | uh-dept
having knowledge or skill (usually in a particular area)

Adapt  

Verb | uh-dapt
to accommodate oneself to a new condition, setting, or situation

Acquisition  

Noun | ak-wuh-zish-uhn
the act of gaining a skill or possession of something

Accordingly  

Adverb | uh-kawr-ding-lee
in accordance with

Abysmal  

Adjective | uh-biz-muhl
extremely bad