white arsenic vs ratsbane

white arsenic and ratsbane both are nouns.

Word	Noun	Adjective	Verb	Adverb
white arsenic	Yes	No	No	No
ratsbane	Yes	No	No	No

As nouns, white arsenic and ratsbane are synonyms defined as:

white arsenic and ratsbane: a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer

Other synonyms of white arsenic include arsenic, arsenic trioxide, arsenous anhydride, arsenous oxide.

white arsenic (noun)	ratsbane (noun)
a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer	a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer