Synonyms for Half-baked:

adj.

all (adjective)
softheaded, crazy, screwball.
early (adjective)
untimely, early, precipitous.
senseless (adjective)
foolish, brainless, superficial, shallow.
shallow (adjective)
shallow.
softheaded (adjective)
softheaded.
stupid; not thought through (adjective)
crazy, brainless, impractical, foolish.

n.

impracticable, preparatory, workable, provisional, well thought out, strategic, scheduled, aggressive, foolproof, tactical. half-baked (noun)
impractical, raw, crazy, meshugge, underdone, meshuga, softheaded, screwball.

Other synonyms:

Other relevant words:
impractical, crazy, meshuga, well thought out, aggressive, workable, underdone, meshugge, softheaded, foolproof, provisional, superficial, screwball, raw, impracticable, brainless, scheduled, strategic, tactical, foolish, preparatory, shallow.