| Term | Definition |
| Eccentric | adj; different from most, especially in personality or behavior |
| Eclectic | adj; choosing from many different sources; carefully selective |
| Efface | v; erase |
| Effervescence | n; the quality of being bubble or full of life |
| Efficacy | n; the ability to produce desired results |
| Elated | adj; extremely happy; overjoyed |
| Eloquence | n; powerfully effective speech |
| Embellish | v; to make more beautiful; decorate; adorn |
| Emulate | v; imitate |
| Endemic | adj; native to a particular country or among a particular group |
| Endorse | v; promote; recommend |
| Enervate | v; sap the strength; weaken |
| Enhance | v; intensify; improve |
| Enigma | n; mystery; puzzle |
| Enmity | n; mutual hatred |
| Ephemeral | adj; temporary; short-lived |
| Eradicate | v; remove completely and permanently; exterminate |
| Erratic | adj; unpredictable; differing from what is normal or expected |
| Erudition | n; the knowledge acquired through many years of study |
| Esoteric | adj; known to, or understood by, a limited group of people |