captopril vs ACE inhibitor

captopril and ACE inhibitor both are nouns.

Word	Noun	Adjective	Verb	Adverb
captopril	Yes	No	No	No
ACE inhibitor	Yes	No	No	No

As nouns, ACE inhibitor is a hypernym of captopril; that is, ACE inhibitor is a word with a broader meaning than captopril:

captopril: a drug (trade name Capoten) that blocks the formation of angiotensin in the kidneys resulting in vasodilation; used in the treatment of hypertension and congestive heart failure
ACE inhibitor: an antihypertensive drug that blocks the formation of angiotensin II in the kidney, leading to relaxation of the arteries; promotes the excretion of salt and water by inhibiting the activity of the angiotensin converting enzyme; also used to treat congestive heart failure

Other hypernyms of captopril include angiotensin-converting enzyme inhibitor.

captopril (noun)	ACE inhibitor (noun)
a drug (trade name Capoten) that blocks the formation of angiotensin in the kidneys resulting in vasodilation; used in the treatment of hypertension and congestive heart failure	an antihypertensive drug that blocks the formation of angiotensin II in the kidney, leading to relaxation of the arteries; promotes the excretion of salt and water by inhibiting the activity of the angiotensin converting enzyme; also used to treat congestive heart failure