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)

ご苦労様[gokurousama] thank you very much for your ...
御苦労さん[gokurousan] I appreciate your efforts
慰労[irou] recognition of services
過労[karou] overwork
過労死[karoushi] death from overwork and mental stress

気苦労[kigurou] worry
漁労[gyorou] fishing
共労者[kyourousha] coworker
勤労[kinrou] labor
勤労階級[kinroukaikyuu] salaried class

くつくつ法師[kutsukutsuboushi] Meimuna opalifera (species of cicada)
つくつく法師[tsukutsukuboushi] Meimuna opalifera (species of cicada)
エライザ法[eraizahou] enzyme-linked immunoSorbent assay (virus detection method)
ケーソン工法[keesonkouhou] caisson method
シールド工法[shiirudokouhou] shield method

モンテカルロ法[montekarurohou] Monte Carlo method
悪法[akuhou] bad law
暗号化手法[angoukashuhou] cryptography
暗号手法[angoushuhou] cryptography
違法[ihou] illegal