ammonia water vs ammonium hydroxide

ammonia water and ammonium hydroxide both are nouns.

Word	Noun	Adjective	Verb	Adverb
ammonia water	Yes	No	No	No
ammonium hydroxide	Yes	No	No	No

As nouns, ammonia water and ammonium hydroxide are synonyms defined as:

Other synonyms of ammonia water include ammonia.

ammonia water (noun)	ammonium hydroxide (noun)
a water solution of ammonia	a water solution of ammonia