calcium hydrate vs caustic lime

calcium hydrate and caustic lime both are nouns.

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

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

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

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

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