1. Not subject to decay

See also: imperishable

• 4WD
• 5
• 5-hitter
• 5-hydroxy-3-methylglutaryl-coenzyme A reductase
• 5-hydroxytryptamine
• 5-membered
• 50
• 500
• 500th
• 50th
• 51
• 52
• 53
• 54
• 55
• 55th
• 56
• 57
• 58
• 59
• 5th
• 6
• 6 June 1944
• 6-membered
• 60