1. Never having had security classification
   - unrestricted

See also: unclassified

• pentanoic acid
• pentarchy
• pentastomid
• Pentastomida
• pentasyllabic
• Pentateuch
• pentathlete
• pentathlon
• pentatone
• pentatonic
• pentatonic scale
• pentavalent
• pentazocine
• Pentecost
• pentecostal
• Pentecostal religion
• pentecostalism
• Pentecostalist
• penthouse
• pentimento
• pentlandite
• pentobarbital
• pentobarbital sodium
• pentobarbitone
• pentode