Enigma
Puzzle
Engender
Produce
Ephemeral
Short lived
Equivocal
Ambiguous, intentionally misleading
Erratic
Odd
Erudite
Scholarly
Esoteric
Hard to understand
Eulogy
Expression of praise, often on the occasion of someone’s death
Euphemism
A mild expression in place of an unpleasant one
Exacerbate
Worsen
Exemplary
Outstanding
Exhaustive
Comprehensive
Exonerate
Exculpate
Expedient
Politic, practical
Explicit
Definite, totally clear, outspoken