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

Type of: mail

• fish knife
• fish ladder
• fish loaf
• fish louse
• fish lure
• fish meal
• fish mousse
• fish oil
• fish scale
• fish slice
• fish species
• fish steak
• fish stew
• fish stick
• fish tank
• fish-liver oil
• fish-worship
• fishbone
• fishbowl
• fisher
• fisher cat
• fisherman
• fisherman's bend
• fisherman's knot
• fisherman's lure