text vs primer

text and primer both are nouns.

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

As nouns, primer is a hyponym of text; that is, primer is a word with a more specific, narrower meaning than text:

Other hyponyms of text include crammer, introduction, reader.

text (noun)	primer (noun)
the words of something written	any igniter that is used to initiate the burning of a propellant
the main body of a written work (as distinct from illustrations or footnotes etc.)	the first or preliminary coat of paint or size applied to a surface
a book prepared for use in schools or colleges	an introductory textbook
a passage from the Bible that is used as the subject of a sermon

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