偉丈夫[ijoufu] great man
一妻多夫[issaitafu] polyandry
一夫一婦[ippuippu] monogamy
一夫多妻[ipputasai] polygamy
駅夫[ekifu] railway employee (porter)

鰥夫[yamoo] widower
火夫[kafu] fireman
姦夫[kanpu] adulterer
旧夫[kyuufu] former husband
漁夫[gyofu] fisherman

隠密[onmitsu] privacy
過密[kamitsu] overcrowding
確率密度関数[kakuritsumitsudokansuu] probability density function
機密[kimitsu] secrecy
機密性[kimitsusei] confidentiality

機密保護[kimitsuhogo] security (e.g. data, password, etc.)
気密[kimitsu] airtight
気密室[kimitsushitsu] airtight chamber
緊密[kinmitsu] rigour
軍事秘密[gunjihimitsu] military secret