企て[kuwadate] plan
企てる[kuwadateru] to plan
企み[takurami] plan
企む[takuramu] to scheme
企劃[kikaku] planning

企画書[kikakusho] proposal (business)
企及[kikyuu] attempt
企業[kigyou] enterprise
企業プラン[kigyoupuran] corporate plan (business)
企業化[kigyouka] commercialization