caustic lime vs calcium hydroxide

caustic lime and calcium hydroxide both are nouns.

Word	Noun	Adjective	Verb	Adverb
caustic lime	Yes	No	No	No
calcium hydroxide	Yes	No	No	No

As nouns, caustic lime and calcium hydroxide are synonyms defined as:

caustic lime and calcium hydroxide: a caustic substance produced by heating limestone

Other synonyms of caustic lime include calcium hydrate, hydrated lime, lime, lime hydrate, slaked lime.

caustic lime (noun)	calcium hydroxide (noun)
a caustic substance produced by heating limestone	a caustic substance produced by heating limestone