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)

一郭[ikkaku] one block
外郭[gaikaku] outer wall (e.g. castle)
外郭団体[gaikakudantai] auxiliary organization
郭公[kakkou] common cuckoo (Cuculus canorus)
胸郭[kyoukaku] chest

五稜郭[goryoukaku] five-sided fortification
城郭[joukaku] fortress
郭公[hototogisu] lesser cuckoo (Cuculus poliocephalus)
遊郭[yuukaku] red light district
輪郭[rinkaku] contour