Abundant
Large quantities of something
Accurate
Ex: "Correct" or "exact"
Acquire
Ex: "lose" or "disperse"
Adamant
Ex: "She was adamant she was not guilty of the crime."
Adequate
Enough to meet a specific purpose
Adjacent
Ex: "adjoining"
Adverse
Ex: advantageous or beneficial
Ambiguous
Ex: "When I asked if I had a good chance of getting the job, the hiring team's answer was ambiguous.
Annihilate
To destroy or kill
Antipathy
Arduous
Ex: easy or effortless
Attribute
Ex: "Be sure to attribute credit to your sources when writing a research paper."
Arbitrary
Based on a whim
Benevolent
Ex: compassionate or generous
Bolster
Ex: reinforce or strengthen
Burgeoning
Growing quickly
Candid
Clarify
Ex: complicate or confuse
Complacent
Ex: "After getting a high score on his first test, Adam became complacent and did not study for the second test."