gravure vs heliogravure

gravure and heliogravure both are nouns.

Word	Noun	Adjective	Verb	Adverb
gravure	Yes	No	No	No
heliogravure	Yes	No	No	No

As nouns, gravure and heliogravure are synonyms defined as:

Other synonyms of gravure include photogravure.

gravure (noun)	heliogravure (noun)
the act of intaglio printing	an intaglio print produced by gravure
an intaglio print produced by gravure
a printing plate used in the process of gravure
a printing process that uses an etched or engraved plate; the plate is smeared with ink and wiped clean, then the ink left in the recesses makes the print