Here's a whole page with inventions starting with the letter "D":
http://inventors.about.com/od/dstartinventions/a/Inventions_D.htm
ice maker
Solar Panels
there is no religion that starts with the letter "d"
Yes , A Donut is delicious and starts with letter D
The precious gem that starts with the letter d it the diamond
Yodeling.
Death
Invention of the jigsaw puzzle
A place in California that starts with the letter d is Day Valley.
A word for headless that starts with the letter D might be decapitated.
denominator is a math term that starts with the letter d. the denominator is the bottom hafe of a fraction.
Kleenex, kaleidoscope, kitchen sink, kevlar