arch·en·e·my 
(ärch-ĕnə-mē)
(ärch-ĕnə-mē)n.
1. A principal enemy.
2. often Archenemy The Devil; Satan. Used with the.
- disablement
- disabling
- disablingly
- disabuse
- disaccharidase
- disaccharide
- disaccord
- disaccustom
- disadvantage
- disadvantaged
- disadvantagedness
- disadvantageous
- disadvantageously
- disaffect
- disaffected
- disaffectedly
- disaffection
- disaffiliate
- disaffiliation
- disaffirm
- disaffirmance
- disaffirmation
- disaggregate
- disaggregation
- disaggregative