lipogram vs textual matter

lipogram and textual matter both are nouns.

Word	Noun	Adjective	Verb	Adverb
lipogram	Yes	No	No	No
textual matter	Yes	No	No	No

As nouns, textual matter is a hypernym of lipogram; that is, textual matter is a word with a broader meaning than lipogram:

lipogram: a text that excludes a particular letter or particular letters of the alphabet
textual matter: the words of something written

Other hypernyms of lipogram include text.

lipogram (noun)	textual matter (noun)
a text that excludes a particular letter or particular letters of the alphabet	the words of something written