diaglyph vs glyptography

diaglyph and glyptography both are nouns.

Word	Noun	Adjective	Verb	Adverb
diaglyph	Yes	No	No	No
glyptography	Yes	No	No	No

As nouns, glyptography is a hypernym of diaglyph; that is, glyptography is a word with a broader meaning than diaglyph:

diaglyph: glyptic art consisting of a sunken or depressed engraving or carving on a stone or gem (as opposed to cameo)
glyptography: carvings or engravings (especially on precious stones)

Other hypernyms of diaglyph include glyptic art.

diaglyph (noun)	glyptography (noun)
glyptic art consisting of a sunken or depressed engraving or carving on a stone or gem (as opposed to cameo)	carving or engraving (especially on stones)
	carvings or engravings (especially on precious stones)