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)

応募[oubo] subscription
応募者[oubosha] applicant
急募[kyuubo] urgent recruit
共同募金[kyoudoubokin] community chest
言募る[iitsunoru] to argue vehemently

公募[koubo] public appeal (e.g. for contributions)
公募債[koubosai] public issue
召募[shoubo] levy
吹き募る[fukitsunoru] to blow harder and harder
募る[tsunoru] to invite contributions, etc.