mitral stenosis vs stricture

mitral stenosis and stricture both are nouns.

Word	Noun	Adjective	Verb	Adverb
mitral stenosis	Yes	No	No	No
stricture	Yes	No	No	No

As nouns, stricture is a hypernym of mitral stenosis; that is, stricture is a word with a broader meaning than mitral stenosis:

mitral stenosis: obstruction or narrowing of the mitral valve (as by scarring from rheumatic fever)
stricture: abnormal narrowing of a bodily canal or passageway

Other hypernyms of mitral stenosis include stenosis, valvular heart disease.

mitral stenosis (noun)	stricture (noun)
obstruction or narrowing of the mitral valve (as by scarring from rheumatic fever)	severe criticism
	abnormal narrowing of a bodily canal or passageway