- echinococcosis
- echinocereus
- echinoderm family
- echinoidea
- echinoderm genus
- echinops
- echinodermata
- echium
- echinus esculentus
- echo chamber
- echoing
- echium vulgare
- echo sounding
- echoism
- echolocation
- echt
- eclair
- eckhart
- eck
- eclampsia
- eclectic
- eclat
- eclecticist
- eclectic method
- eclipse
- ecliptic
- ecm
- eco
- est
- economic theory
- economical
- economic value
- economical and yet of a superior quality
- economics department
- economics profession
- economiser
- economizer
- ecosoc
- economy of scale
- ecosoc commission
- econony
- ecoterrorism
- ecrevisse
- ecru
- ectoblast
- ecstatic state
- ect
- ectodermic
- ectasia
- ectasis