1. Mail that includes letters and postcards and packages sealed against inspection
   - first class, first-class mail, 1st-class mail

Type of: mail

• scantness
• scanty
• scape
• scapegoat
• scapegrace
• Scaphiopus
• Scaphiopus bombifrons
• Scaphiopus hammondii
• Scaphiopus multiplicatus
• scaphocephaly
• scaphoid
• scaphoid bone
• scaphopod
• Scaphopoda
• Scaphosepalum
• scapolite
• scapose
• scapula
• scapular
• scapulary
• scapulohumeral
• scar
• scar tissue
• scarab
• scarabaean