gluten vs corn gluten

gluten and corn gluten both are nouns.

Word	Noun	Adjective	Verb	Adverb
gluten	Yes	No	No	No
corn gluten	Yes	No	No	No

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

gluten: a protein substance that remains when starch is removed from cereal grains; gives cohesiveness to dough
corn gluten: gluten prepared from corn

Other hyponyms of gluten include wheat gluten.

gluten (noun)	corn gluten (noun)
a protein substance that remains when starch is removed from cereal grains; gives cohesiveness to dough	gluten prepared from corn