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

敵わない[kanawanai] no match for
怨敵[onteki] sworn enemy
外敵[gaiteki] foreign enemy
敵う[kanau] to come true (wish)
仇敵[kyuuteki] bitter enemy

敵討[katakiuchi] vengeance
敵同士[tekidoushi] mutual enemies
旧敵[kyuuteki] old enemy
強敵[kyouteki] formidable enemy
公敵[kouteki] public enemy