Altercation-A vehement quarrel

Vehement-Characterized by forcefulness of expression or intensity of emotion or conviction; fervid: a vehement denial. See Synonyms at intense. Marked by or full of vigor or energy; strong: a vehement storm.

Ambivalent-characterized by a mixture of opposite feelings or attitudes; "she felt ambivalent about his proposal"; "an ambivalent position on rent control" 2: uncertain or unable to decide about what course to follow; "was ambivalent about having children"

Amicable-Characterized by or exhibiting friendliness or goodwill; friendly. While the discussion was very spirited, the most amicable feelings were displayed on all sides.

Anathema-One that is greatly reviled, loathed, or shunned; One that is cursed or damned.

Apathy-Lack of interest or concern, especially regarding matters of general importance or appeal; indifference. Lack of emotion or feeling; impassiveness

Appease-To bring peace, quiet, or calm to; soothe. To satisfy or relieve: appease one's thirst.

Arduous-Demanding great effort or labor; difficult: “the arduous work of preparing a Dictionary of the English Language” (Thomas Macaulay). Testing severely the powers of endurance; strenuous: a long, arduous, and exhausting war.

Audacity-Fearless daring; intrepidity. Bold or insolent heedlessness of restraints, as of those imposed by prudence, propriety, or convention. An act or instance of intrepidity or insolent heedlessness: warned the students than any audacities committed during the graduation ceremony would be punished.

Augment-To make (something already developed or well under way) greater, as in size, extent, or quantity: Continuing rains augmented the floodwaters.

Austere-Severe or stern in disposition or appearance; somber and grave: the austere figure of a Puritan minister. Strict or severe in discipline; ascetic: a desert nomad's austere life.