lime hydrate vs caustic lime

lime hydrate and caustic lime both are nouns.

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

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

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

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

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