お使[otsukai] errand
み使い[mitsukai] angel
悪天使[akutenshi] evil angels
かな使い[kanazukai] kana orthography
雁の使い[karinotsukai] (a) letter

旧仮名使い[kyuukanazukai] former (i.e. before the post-WWII reforms) kana usage in writing the readings of kanji
金を使う[kanewotsukau] to spend money
駆使[kushi] free use
軍使[gunshi] truce bearer
権利行使[kenrikoushi] exercise of a right

使聘[shihei] exchange of diplomatic representatives
招聘[shouhei] (courteous) invitation

傭聘[youhei] employing
招聘理由書[shouheiriyuusho] invitation letter (e.g. document in support of a visa to enter Japan)