calcium hydrate vs calcium hydroxide

calcium hydrate and calcium hydroxide both are nouns.

Word	Noun	Adjective	Verb	Adverb
calcium hydrate	Yes	No	No	No
calcium hydroxide	Yes	No	No	No

As nouns, calcium hydrate and calcium hydroxide are synonyms defined as:

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

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

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