Question: what are cool words that start with d?
Answer: DAB-DUMP. An old Yorkshire dialect word for a pool of water left on the beach after the tide retreats.
DABERLICK. Daberlick or dabberlack is an old dialect name for long, straggly seaweed. ... 
DABSTER. An astute or especially skilled worker.
DAFFLED. ... 
DANDIE-CLAW. ... 
DANDLE. ... 
DANG-SWANG. ... 
DANGLEMENT.