Abdicate
reject, give up
Abhor
hate
Abrupt
sudden
Abundant
plenty
Abyss
bottomless hole
Acclaimed
praise highly
Accord
treaty (n) or to give (v)
Acknowledge
admit existence or truth
Acute
sharp
Adamant
stubborn
Adept
very skilled at something
Adhesive
sticky
Admonish
reprimand/rebuke someone
Adversary
opponent
Affiliation
connection with something/someone/organization
Agenda
plan
Aggrandize
increase the status/wealth of
Aggravate
to make worse
Aggregate
join together into a category
Akin
of similar character
Allege
to claim (that something happened without proof)
Aloof
cool or distant
Altruism
doing something for the sake of others/ selflessly
Ambiguous
unclear