siccative vs drier

siccative and drier both are nouns.

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

As nouns, siccative and drier are synonyms defined as:

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

Other synonyms of siccative include desiccant, drying agent.

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