Amusement, diversion, entertainment, pastime.
Anger, exasperation, petulance, rage, resentment.
Animal, beast, brute, living creature, living organism.
Answer, rejoinder, repartee, reply, response, retort.
Anticipate, forestall, preclude, prevent.
Apiece, individually, severally, separately.
Apparent, clear, evident, obvious, tangible, unmistakable.
Apprehend, comprehend, conceive, perceive, understand.
Arraign, charge, cite, impeach, indict, prosecute, summon.
Arrogance, haughtiness, presumption, pride, self-complacency, superciliousness, vanity.