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)

勲爵[kunshaku] peerage and order of merit
侯爵[koushaku] marquis
侯爵夫人[koushakufujin] marchioness
公爵[koushaku] prince
公爵夫人[koushakufujin] princess

爵位[shakui] peerage
授爵[jushaku] elevation to peerage
襲爵[shuushaku] succession to the peerage
叙爵[joshaku] conferring a peerage
人爵[jinshaku] worldly honors