秘露[peruu] Peru
極秘[gokuhi] absolute secrecy
軍事秘密[gunjihimitsu] military secret
厳秘[genpi] strict secret
公然の秘密[kouzennohimitsu] open secret

社外秘[shagaihi] company secret
神秘[shinpi] mystery
神秘学[shinhigaku] occultism (Western)
神秘的[shinpiteki] mysterious
秘める[himeru] to hide

遺蹟[iseki] historic ruins (remains, relics)
筆蹟[fudeato] handwriting
偉蹟[iseki] remaining works
奇蹟[kiseki] miracle
史蹟[shiseki] historical landmark

真蹟[shinseki] true autograph
事蹟[jiseki] evidence
古蹟[furuato] historic spot
城蹟[joushi] castle site
手蹟[shuseki] holograph