公式【こうしき】
official, formal, formula (e.g. mathematical), official (social media) account (of a company, organization, etc.)
公共【こうきょう】
public (facilities, service, etc.), communal
公園【こうえん】
(public) park
公開【こうかい】
opening to the public, making available to the public, exhibiting, unveiling, release (of a film, information, etc.), disclosure, publication
公演【こうえん】
public performance, exhibition in a foreign country
公明【こうめい】
fairness, openness, impartiality, Komeito (Japanese political party)
公判【こうはん】
public hearing, trial
公害【こうがい】
pollution, public nuisance, contamination
公認【こうにん】
official recognition, official approval, certification, authorization, authorisation
公立【こうりつ】
public (institution)
公表【こうひょう】
official announcement, proclamation
公約【こうやく】
public commitment, public promise, campaign pledge, official vow
公務員【こうむいん】
government worker, public servant, civil servant
主人公【しゅじんこう】
protagonist, main character, hero, heroine, head (of a household), proprietor (of a store)
公邸【こうてい】
official residence
公聴会【こうちょうかい】
public hearing
公算【こうさん】
probability, likelihood
公団【こうだん】
public corporation, public housing
公正【こうせい】
justice, fairness, impartiality
公募【こうぼ】
public appeal (e.g. for contributions), public advertisement (of a post), open recruitment, public offering (of securities)