electrostatic machine vs Van de Graaff generator

electrostatic machine and Van de Graaff generator both are nouns.

Word	Noun	Adjective	Verb	Adverb
electrostatic machine	Yes	No	No	No
Van de Graaff generator	Yes	No	No	No

As nouns, electrostatic machine and Van de Graaff generator are synonyms defined as:

electrostatic machine and Van de Graaff generator: electrical device that produces a high voltage by building up a charge of static electricity

Other synonyms of electrostatic machine include electrostatic generator, Wimshurst machine.

electrostatic machine (noun)	Van de Graaff generator (noun)
electrical device that produces a high voltage by building up a charge of static electricity	electrical device that produces a high voltage by building up a charge of static electricity