Ahead. In front, forward, onward, in advance.
Ant. Abaft, astern, back, behind, aft.
Aid. Help, support, assist, serve, befriend, minister to, relieve, succor; supply, give alms to; foster, protect, encourage, favor.
Ant. Oppose, discourage, thwart, baffle, deter, confront.
Ailing. Sick, ill, indisposed, unwell, feeble, infirm, weakly, delicate, unhealthy, pining.
Ant. Well, healthy, energetic, strong, vigorous.
Ailment. Disease, malady, indisposition, distemper, complaint.
Ant. Health, sanity, convalescence, vigor, recovery.
Aim. Direction, course, tendency, bent, proclivity, bearing; intention, purpose, design, scheme; reason; view, scope, drift, mark, goal, point; endeavor, attempt, aspiration, determination.
Ant. Deviation, divergence, deflection, digression, aberration; tangent; venture, leap, fluke, chance, hazard, speculation; neglect, avoidance, carelessness, oversight.