hydrated vs hydrous

hydrated and hydrous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
hydrated	No	Yes	No	No
hydrous	No	Yes	No	No

As adjectives, hydrated and hydrous are synonyms defined as:

hydrated and hydrous: containing combined water (especially water of crystallization as in a hydrate)

hydrated (adjective)	hydrous (adjective)
containing combined water (especially water of crystallization as in a hydrate)	containing combined water (especially water of crystallization as in a hydrate)