calcium hydroxide vs calcium hydrate

calcium hydroxide and calcium hydrate both are nouns.

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

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

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

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

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