insulin vs hormone

insulin and hormone both are nouns.

Word	Noun	Adjective	Verb	Adverb
insulin	Yes	No	No	No
hormone	Yes	No	No	No

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

insulin: hormone secreted by the isles of Langerhans in the pancreas; regulates storage of glycogen in the liver and accelerates oxidation of sugar in cells
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 insulin include endocrine, internal secretion, hypoglycaemic agent, hypoglycemic agent.

insulin (noun)	hormone (noun)
hormone secreted by the isles of Langerhans in the pancreas; regulates storage of glycogen in the liver and accelerates oxidation of sugar in cells	the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect