Dwindle : Decrease, Diminish
Dorm : Inactive, latent
Dolorous : Doleful, Somber, Mournful
Disgorge : Expel, Spew, eject.
Diabolical : Devilish, Demonic, wicked
Dissent : Disagree, Deny
Dismay : Despair, Distress
Disheveled : Untidy, Chaotic, disordered
Discord : Conflict, Contention
Discernible : Visible, Palpable
Devoid : Vacant, empty
Despise : Hate, disdain
Detrimental : Harmful, evil
Deride : Mock, scorn, scoff
Deluge : Flood, overflow, inundation
Dauntless : Bold, Fearless, brave
Defunct : Obsolete, Outdated