に対して[nitaishite] towards
に対する[nitaisuru] regarding
テロ対策[terotaisaku] anti-terrorist
安全対策[anzentaisaku] safety measure
一対[ittsui] pair

１対一[ichitaiichi] one-to-one
応対[outai] receiving
空対空[kuutaikuu] air-to-air
空対地[kuutaichi] air-to-surface
空対地ミサイル[kuutaichimisairu] air-to-surface missile

案価[anka] low price
案じる[anjiru] to be anxious or concerned about
案の上[annojou] just as one thought
案下[anka] under the table
案外[angai] unexpectedly

案件[anken] matter in question
案山子[kakashi] scarecrow
案出[anshutsu] contrivance
案内[annai] information