decahedron/dekəʹheedrən/ noun (pl decahedra decahedrons)

• expeditious
• expel
• expend
• expendable
• expenditure
• expense
• expense account
• expensive
• experience
• experienced
• experiential
• experiment
• experimental
• expert
• expertise
• expert system
• expiate
• expiration
• expire
• expiry
• explain
• explain away
• explain oneself
• explanation
• explanative