ane/ayn/ adj, noun, and pronoun

• echinoid
• echinus
• echo
• echocardiography
• echo chamber
• echogram
• echography
• echoic
• echolalia
• echolocation
• echo sounder
• echovirus
• echt
• eclampsia
• eclectic
• eclipse
• eclipse plumage
• eclipsing binary
• eclipsing variable
• ecliptic
• eclogue
• eclosion
• eco-
• ecocentric
• ecocide