protectress/prəʹtektris/ noun

• expectorate
• expedience
• expediency
• expedient
• expedite
• expedition
• expeditious
• expel
• expend
• expendable
• expenditure
• expense
• expense account
• expensive
• experience
• experienced
• experiential
• experiment
• experimental
• expert
• expertise
• expert system
• expiate
• expiration
• expire