text vs textual

text is a noun but textual is not a noun.

Word	Noun	Adjective	Verb	Adverb
text	Yes	No	Yes	No
textual	No	Yes	No	No

text (noun)	textual (noun)
the words of something written
the main body of a written work (as distinct from illustrations or footnotes etc.)
a book prepared for use in schools or colleges
a passage from the Bible that is used as the subject of a sermon

text (adjective)	textual (adjective)
	of or relating to or based on a text

text (verb)	textual (verb)
to send a message by SMS or similar text-based messaging service