恩を仇で返す[onwoadadekaesu] to return evil for good
仇敵[kyuuteki] bitter enemy
仇討[adauchi] vengeance
仇同士[katakidoushi] mutual enemies

仇讎[kyuushuu] revenge
商売仇[shoubaigataki] business rival
復仇[fukkyuu] reprisal
仇名[adana] nickname

これと同じ[koretoonaji] the same as this
と同じ様に[toonajiyouni] in the same way as
安定同位体[anteidouitai] stable isotope
異句同音[ikudouon] in concert
異口同音に[ikudouonni] in one voice

異同[idou] difference
一口同音[ikkudouon] reading in unison
一視同仁[isshidoujin] loving every human being with impartiality
一心同体[isshindoutai] being one in body and soul
一同[ichidou] all present

医学技術士[igakugijutsushi] medical technician
医学士[igakushi] Bachelor of Medicine
一言居士[ichigenkoji] person who is ready to comment on every subject
一士[isshi] private first-class (JSDF)
隠士[inshi] hermit

宇宙飛行士[uchuuhikoushi] astronaut
運転士[untenshi] driver
栄養士[eiyoushi] nutritionist
下士[kashi] noncommissioned officer
下士官[kashikan] non-commissioned officer

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