1. Not subject to decay

See also: imperishable

• echoencephalography
• echoey
• echogram
• echography
• echoic
• echoing
• echolalia
• echoless
• echolike
• echolocation
• echovirus
• echt
• Eck
• Eckhart
• eclair
• eclampsia
• eclectic
• eclectic method
• eclectically
• eclecticism
• eclecticist
• eclipse
• eclipsis
• ecliptic
• eclogue