drier vs siccative

drier and siccative both are nouns.

Word	Noun	Adjective	Verb	Adverb
drier	Yes	No	No	No
siccative	Yes	No	No	No

As nouns, drier and siccative are synonyms defined as:

drier and siccative: a substance that promotes drying (e.g., calcium oxide absorbs water and is used to remove moisture)

Other synonyms of drier include desiccant, drying agent.

drier (noun)	siccative (noun)
an appliance that removes moisture	a substance that promotes drying (e.g., calcium oxide absorbs water and is used to remove moisture)
a substance that promotes drying (e.g., calcium oxide absorbs water and is used to remove moisture)