text vs message

text and message both are nouns.

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

As verbs, message is a hypernym of text; that is, message is a word with a broader meaning than text:

text (noun)	message (noun)
the words of something written	content communicating a message; what something is about
the main body of a written work (as distinct from illustrations or footnotes etc.)	a communication (usually brief) that is written or spoken or signaled
a book prepared for use in schools or colleges
a passage from the Bible that is used as the subject of a sermon

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