potassium hydroxide vs lye

potassium hydroxide and lye both are nouns.

Word	Noun	Adjective	Verb	Adverb
potassium hydroxide	Yes	No	No	No
lye	Yes	No	No	No

As nouns, lye is a hypernym of potassium hydroxide; that is, lye is a word with a broader meaning than potassium hydroxide:

potassium hydroxide: a potassium compound often used in agriculture and industry
lye: a strong solution of sodium or potassium hydroxide

Other hypernyms of potassium hydroxide include hydrated oxide, hydroxide.

potassium hydroxide (noun)	lye (noun)
a potassium compound often used in agriculture and industry	a strong solution of sodium or potassium hydroxide