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

ガラス綿[garasumen] glass wool
引き綿[hikiwata] floss silk
海綿[kaimen] sponge
強綿薬[kyoumenyaku] guncotton
絹綿[kinuwata] silk floss

原綿[genmen] raw cotton
晒し木綿[sarashimomen] bleached cotton cloth
真綿[mawata] silk floss
脱脂綿[dasshimen] absorbent cotton
南京木綿[nankinmomen] nankeen (cloth)