drum·lin 
(drŭmlĭn)
(drŭmlĭn)n.
An elongated hill or ridge of glacial drift.
[From drum, ridge, from Irish Gaelic druim, back, ridge, from Old Irish.]
drumlin- electrifier
- electrify
- electrifyingly
- electro-
- electroanalysis
- electroanalytic
- electroanalytical
- electrocardiogram
- electrocardiograph
- electrocardiographic
- electrocardiographically
- electrocardiography
- electrocautery
- electrochemical
- electrochemical cell
- electrochemically
- electrochemist
- electrochemistry
- electrochromic
- electrocoagulation
- electroconvulsive therapy
- electrocute
- electrocution
- electrode
- electrodeposit