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)

明白[meihaku] obvious
明白[akarasama] plain
明かん[akan] useless
また明日[mataashita] see you tomorrow
意識不明[ishikifumei] unconscious

印鑑証明[inkanshoumei] certification of official registration of a seal
飲み明かす[nomiakasu] to drink the night away
解明[kaimei] clarification
明ける[akeru] to open (a door, etc.)
明け放す[akehanasu] to open wide (doors, windows, etc.)