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)

益金[ekikin] profit
益虫[ekichuu] useful insect
益鳥[ekichou] beneficial bird
益友[ekiyuu] good friend
過剰利益[kajourieki] excess profit

共益[kyoueki] common profit
共益費[kyouekihi] monthly fee for common areas of an apartment building (lighting, etc.)
権益[keneki] (one's) interests
公益[koueki] public
公益事業[kouekijigyou] public utilities