GI hormones vs hormone

GI hormones and hormone both are nouns.

Word	Noun	Adjective	Verb	Adverb
GI hormones	Yes	No	No	No
hormone	Yes	No	No	No

As nouns, hormone is a hypernym of GI hormones; that is, hormone is a word with a broader meaning than GI hormones:

GI hormones: hormones that affect gastrointestinal functioning
hormone: the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect

Other hypernyms of GI hormones include endocrine, internal secretion.

GI hormones (noun)	hormone (noun)
hormones that affect gastrointestinal functioning	the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect