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)

序に[tsuideni] incidentally
安寧秩序[anneichitsujo] peace and order
機序[kijo] mechanism
時間順序積[jikanjunjoseki] time ordered product (physics)
次序[jijo] order

順序[junjo] order
順序通り[junjodoori] in (the proper) order
順序不同[junjofudou] unordered
順序立てる[junjodateru] to put into order
序で[tsuide] opportunity