insulin vs hypoglycemic agent

insulin and hypoglycemic agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
insulin	Yes	No	No	No
hypoglycemic agent	Yes	No	No	No

As nouns, hypoglycemic agent is a hypernym of insulin; that is, hypoglycemic agent 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
hypoglycemic agent: any of various agents that decrease the level of glucose in the blood and are used in the treatment of diabetes mellitus

Other hypernyms of insulin include endocrine, hormone, internal secretion, hypoglycaemic agent.

insulin (noun)	hypoglycemic agent (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	any of various agents that decrease the level of glucose in the blood and are used in the treatment of diabetes mellitus