tolbutamide vs sulfonylurea

tolbutamide and sulfonylurea both are nouns.

Word	Noun	Adjective	Verb	Adverb
tolbutamide	Yes	No	No	No
sulfonylurea	Yes	No	No	No

As nouns, sulfonylurea is a hypernym of tolbutamide; that is, sulfonylurea is a word with a broader meaning than tolbutamide:

tolbutamide: sulfonylurea; an oral antidiabetic drug (trade name Orinase) used in the treatment of adult-onset diabetes mellitus
sulfonylurea: antidiabetic consisting of any of several drugs that reduce the level of glucose in the blood; used to treat diabetes mellitus

Other hypernyms of tolbutamide include hypoglycaemic agent, hypoglycemic agent.

tolbutamide (noun)	sulfonylurea (noun)
sulfonylurea; an oral antidiabetic drug (trade name Orinase) used in the treatment of adult-onset diabetes mellitus	antidiabetic consisting of any of several drugs that reduce the level of glucose in the blood; used to treat diabetes mellitus