Yes, a pumpkin is a gourd, but some gourds are only ornamental.
squash
Vegetable fat is a mixtures as it is composed of a number of different lipids.
Watermelon.
no corn is a vegetable and plant/crop
Potato is a mixture of several compounds mainly are Starch and water.
Bottle gourd
Bottle Gourd
Squash
round gourd
Technically, it would be classified as a fruit because it bears seeds.
Butternut squash.
Bitter gourd
posh squash
squash
Bitter gourd
The vegetable name "Parval" is commonly known as "Pointed Gourd" in English.
The gourd in your picture is a Maranka or Dolphin gourd, a type of long gourd. See the related link below for more info. (See discussion for more info on the question and a link to the picture of the mystery vegetable)