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

Type of: mail

• survivorship
• survivorship annuity
• Surya
• sus
• Sus scrofa
• Susa
• Susah
• Susan Anthony
• Susan B Anthony dollar
• Susan B. Anthony
• Susan Brownell Anthony
• Susan Sontag
• Susanna
• susceptibility
• susceptible
• susceptibleness
• susceptive
• sushi
• sushi bar
• Susian
• Susiana
• suslik
• suspect
• suspected
• suspend