baryta water vs baryta-water

baryta water and baryta-water both are nouns.

Word	Noun	Adjective	Verb	Adverb
baryta water	Yes	No	No	No
baryta-water	Yes	No	No	No

As nouns, baryta water and baryta-water are synonyms defined as:

baryta water and baryta-water: an aqueous solution of barium hydroxide, used chiefly as a reagent.

baryta water (noun)	baryta-water (noun)
an aqueous solution of barium hydroxide, used chiefly as a reagent.	an aqueous solution of barium hydroxide, used chiefly as a reagent.