drier vs desiccant

drier and desiccant both are nouns.

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

As nouns, drier and desiccant are synonyms defined as:

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

Other synonyms of drier include drying agent, siccative.

drier (noun)	desiccant (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)