カード会員[kaadokaiin] (credit) card holder
ユダヤ教会堂[yudayakyoukaidou] synagogue
委員会[iinkai] committee
医会[ikai] medical society
医師会[ishikai] medical association

井戸端会議[idobatakaigi] content-free chat
育英会[ikueikai] scholarship society
一期一会[ichigoichie] once-in-a-lifetime encounter (hence should be cherished as such)
一般会計[ippankaikei] general accounting and finance
一般社会[ippanshakai] general public

ハチ公[hachikou] statue of Hachiko (a dog) at Shibuya station
郭公[kakkou] common cuckoo (Cuculus canorus)
株式公開[kabushikikoukai] stock offering (to the public)
蒲公英[tanpopo] dandelion (esp. species Taraxacum platycarpum)
官公庁[kankouchou] government administration office

丸公[marukou] official price
勤め奉公[tsutomeboukou] apprenticeship
公平[kinpira] chopped burdock root (and sometimes carrot) cooked in sugar and soy sauce
公孫樹[kousonju] ginkgo (Ginkgo biloba)

ユダヤ教会堂[yudayakyoukaidou] synagogue
位牌堂[ihaidou] mortuary chapel
一堂[ichidou] one building (hall, temple, shrine, room)
会堂[kaidou] church
会堂司[kaidouzukasa] ruler of a synagogue

議事堂[gijidou] Diet building
公会堂[koukaidou] town hall
講堂[koudou] auditorium
国会議事堂[kokkaigijidou] national parliament or congress building (e.g. National Diet (Japan), Capitol Hill (US), Houses of Parliament (UK), etc.)
参堂[sandou] visiting a home or a shrine