potassium hydroxide vs caustic potash

potassium hydroxide and caustic potash both are nouns.

Word	Noun	Adjective	Verb	Adverb
potassium hydroxide	Yes	No	No	No
caustic potash	Yes	No	No	No

As nouns, potassium hydroxide and caustic potash are synonyms defined as:

potassium hydroxide and caustic potash: a potassium compound often used in agriculture and industry

Other synonyms of potassium hydroxide include potash.

potassium hydroxide (noun)	caustic potash (noun)
a potassium compound often used in agriculture and industry	a potassium compound often used in agriculture and industry