text vs textbook

text and textbook both are nouns.

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

As nouns, text and textbook are synonyms defined as:

Other synonyms of text include school text, schoolbook, text edition.

text (noun)	textbook (noun)
the words of something written	a book prepared for use in schools or colleges
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)	textbook (adjective)
	according to or characteristic of a casebook or textbook; typical

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