The Collaborative International Dictionary of English v.0.48:

Forethought \Fore"thought`\, a.
   Thought of, or planned, beforehand; aforethought; prepense;
   hence, deliberate. "Forethought malice." --Bacon.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Forethought \Fore"thought`\, n.
   A thinking or planning beforehand; prescience; premeditation;
   forecast; provident care.
   [1913 Webster]

         A sphere that will demand from him forethought,
         courage, and wisdom.                     --I. Taylor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

forethought
    n 1: planning or plotting in advance of acting [syn:
         premeditation, forethought]
    2: judiciousness in avoiding harm or danger; "he exercised
       caution in opening the door"; "he handled the vase with care"
       [syn: caution, precaution, care, forethought]

Moby Thesaurus II by Grady Ward, 1.0:

111 Moby Thesaurus words for "forethought":
   TLC, aforethought, anticipation, approach, arrangement, attack,
   attention, blueprint, blueprinting, calculatedness, calculation,
   canniness, care, carefulness, caution, charting, circumspection,
   circumspectness, conception, concern, consideration, contrivance,
   deliberateness, deliberation, design, device, discreetness,
   discretion, disposition, enterprise, envisagement,
   express intention, expressness, figuring, forearming,
   forehandedness, foresight, foresightedness, forethoughtfulness,
   game, graphing, ground plan, guidelines, gumption, heed,
   heedfulness, idea, insurance, intention, intentionality, judgment,
   layout, lineup, long-range plan, loving care, mapping, master plan,
   measures, method, methodology, mindfulness, operations research,
   organization, plan, planning, planning function, plotting,
   prearrangement, precaution, precautions, precautiousness,
   preconsideration, predeliberation, predetermination, premeditation,
   preparedness, preresolution, preventive measure, procedure,
   program, program of action, protection, providence, provision,
   rationalization, regard, regardfulness, safeguard, schedule,
   schema, schematism, schematization, scheme, scheme of arrangement,
   sense, setup, solicitude, steps, steps and measures,
   strategic plan, strategy, system, systematization, tactical plan,
   tactics, tender loving care, the big picture, the picture,
   thoughtfulness, way, working plan