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

陰弁慶[kagebenkei] lion at home but weakling elsewhere
慶ぶ[yorokobu] to be delighted
慶賀[keiga] congratulation
慶事[keiji] auspicious event
慶祝[keishuku] congratulation

慶弔[keichou] congratulations and condolences
慶安[keian] agency for employing servants and arranging marriages (Edo period)
国慶節[kokkeisetsu] anniversary of founding (of PRC)
同慶[doukei] matter for mutual congratulation
内弁慶[uchibenkei] braggart