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.